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Where do they go?

Just purchase my first 928--a 1982 Auto.

Have worked on many VW's-Toyota's-Nissan's etc in a past life but this will surely test everything I have in me. So, looking to connect with some veteran wrenchers of 928's. I do 99% of my own repairs and feel confident that I will have this jewel up and running soon.

Purchased the car not running and former owner did some dabbling with relays, pump, etc. Owner said one day it just died on road and hasn't started since. Battery is excellent but at this time no fuel. Please lend a hand and I'd be grateful.

1. Decided to go around and clean up all the ground areas so I'm confortable with grounds being grounded--seems like many post have been hammering away that this is crucial. Started with battery ground and it is now cleaned up.
Have a diagram showing the grounds--any that are going to be stubborn or could be bypassed for now?

2. Found 2 lonely brown wires--see pics--where do they connect too???
Located in the rear well by neg. strap to body location. Pictures was taken from inside car so as you look over rear well they would be reversed in the picture---double wire is on the left looking inward.

3. Going back out to clean all the fuse holder rails to get ride of crud and brighten contacts.

4. Jumped #30 and #87--nothing?

5. Used 12v tester to see if any power to any terminals with relay off----nothing--bet you are not surprised either. So, after cleaning fuse rails what are the chances I will see power to the relay?

6. Cd manual is in the mail-still waiting.

So please jump in and hopefully I can resurrected this wonderful flying machine.

Thanks,
David (Massillon, Ohio)


Last edited by heritage2008; 07-23-2012 at 08:12 AM..
Old 07-23-2012, 08:07 AM
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All brown wires in 928 are grounds.

Use fues/relay chart located here: https://www.928gt.com/default1.htm

So with the battery hooked up, do you have 12V at terminal 30 of relay XVII? You should always have power there. (even with the key off)
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Grand Prix White 1994 GTS AT (The GTS)
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Black Metallic 1984 Euro S 5 speed (The Schwartz)
Old 07-23-2012, 11:14 AM
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John,

Have been cleaning fuse block but will have battery back in later today to recheck whether there is power at relay. Earlier today before tear down I got nothing--even jumped the two points as mentioned. I also move the horn relay into pump relay and again---nothing.

So I didn't find anything to plug the male end of the double brown wires into nor the single brown that was coming off latch connector--where do they ground too? The single brown has a female rolled/barrel type connector so it needs to plug into something. The other is certainly a male end to a female end somewhere.

What steps do I take to remove the passenger side rear trim panel that runs lower of the side window--tried the driver side by removing 3 screws but didn't want to man handle it yet till learned more.

Back on later-thanks for the info. Looks like I'll be working through multiple fix its. Want to work on getting all grounds squared away asap.

Thanks,
David
Old 07-23-2012, 01:02 PM
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David,
So if you ground a test light and put the probe into terminal 30, you get nothing? Terminal 30 should have 12V on it all the time as I said previously. If you remove the relay and run a jumper from terminal 30 to terminal 87, that effectively bypasses the relay function and removes the relay from suspicion.

I wonder if one of those grounds is the fuel pump ground. I'll have a look when I get home and let you know whay I see.

It has been a long long time since I pulled my quarter trim. I remember it not being real fun though.
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Grand Prix White 1994 GTS AT (The GTS)
Cobalt Blue 1989 S4 AT (The Blue Car)
Indishrot 1984 Euro S AT (The Stepson)
Black Metallic 1984 Euro S 5 speed (The Schwartz)
Old 07-23-2012, 03:38 PM
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David,
I just looked at my '84 Euro and I think the single brown wire is the ground for the rear wiper motor case. It is held by one the small screws in the case.
I believe the double brown wire goes into a white connector with 4 other wires. The purpose of that connector escapes me at the present time. I am thinking it is the harness for the rear remote hatch release?
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Grand Prix White 1994 GTS AT (The GTS)
Cobalt Blue 1989 S4 AT (The Blue Car)
Indishrot 1984 Euro S AT (The Stepson)
Black Metallic 1984 Euro S 5 speed (The Schwartz)
Old 07-23-2012, 04:52 PM
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Looking for white connector

Thanks John for replies.

I thought the single barrel went to a screw because of its shape--makes since because of design. Will hook it up tmro after a round of golf. Spent the evening doing grounds, replacing dried out fuel lines, placing vacuum hoses back on after trimming--wow--not surprised this car stopped running. Pulled the cap and rotor and looks like the rotor has been rubbing the heck out of plug sending plates--rotor edge is almost flush with plastic---R & R those. Really want to get old gas out of this thing but dread messing with gas--read a ton on subject and not looking forward to it.

Did not get back to fuse/relay box but its on the list for tomorrow evening. I will run test again as see where I'm at. Hope to get cap/rotor tmro and may just fire it up after finishing fuse/relays.

I will read posts on pulling driver side rear panel--oh crap! That is probably where the double wire hooks up. Why can't PO's leave things be-lol

Thanks again,
David
Old 07-23-2012, 05:40 PM
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1982 928 us
 
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quarter panels, trim from backside of doors screws/nuts/bolts/clips. speaker/wires. seatbelt/bolts/trim. th type/style hanger button or handle/screws. seat bottoms screw nut bolts bracket. seat backs allen screws nut bolts. in hatch under carpet the screw/bracket along floor. unclip black plastic clips all around windows. the toolkit at hatch mech. and more. quarterpanels. grds- both sides ball of grounds/wiring right at bottom quarter windows back corners.

tail lighting will be there. across tool kit/hatch release wiper connect/hatch release connect and more, around antenna.... speakers depending specific model. as always keep up the good work, and questions coming,lol.
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Last edited by lfausty; 07-23-2012 at 06:24 PM..
Old 07-23-2012, 06:21 PM
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The single wire on the left in the photo looks like the ground wire for the trunk latch pin. It is supposed to be crimped around a spring loaded plastic piece in the lower hatch latch reciever.
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Old 07-24-2012, 06:28 AM
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no place to snap barrel end brown wire

I pulled the latch and found nothing to place this brown wire too--now what do I do. If there is suppose to be a plastic spring loaded male end--its not there--does make sense so that the latch light would operate when opened and off when closed.

Going to have to yank--pull drivers side rear panel--looks like a job. Need to locate where to place the double wire.

Cleaned grounds above fuse panel, drivers side ground by radiator but how the heck do you get to the passenger side--looks like it is hidden very well. Cleaned engine ground by head and main braided ground to frame rail and engine.
Pulled all fuses, cleaned ends of good ones with wire wheel--works great. Took emery cloth and cleaned both contact points on panel.

Still have to get ground behind passenger side rear panel--darn!!! Are there specific directions step by step to pull both panels?????

Jumped the fuel pump with a spare battery and gator leads---nothing. So will get to R & R the pump and drain tank. I really don't want to pull tank yet so will drain and use fresh gas and add Techron.

Where can I get a list of all the relays that are suppose to be on the fuse panel and the right panel roman # matched to relay part number--someone was working on this prior to me so would like to double check each one.

I have power to slot #30 on fuel pump relay

Time's up--please jump in anytime--thanks
Old 07-24-2012, 07:27 PM
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Quote:
Originally Posted by heritage2008 View Post

Where can I get a list of all the relays that are suppose to be on the fuse panel and the right panel roman # matched to relay part number--someone was working on this prior to me so would like to double check each one.
See post #2. Go to 928 Specialists website. Left side of the website: Fuse/relay charts by year model. Download and print your year model chart. Carry with you at all times.
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Grand Prix White 1994 GTS AT (The GTS)
Cobalt Blue 1989 S4 AT (The Blue Car)
Indishrot 1984 Euro S AT (The Stepson)
Black Metallic 1984 Euro S 5 speed (The Schwartz)
Old 07-25-2012, 10:38 AM
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Yup

Got the relay numbers and fuse info-putting it back tgr today.

I do have power at #30 slot. Going to jump 30/87 to see if I'm getting power to pump wires. Should I just use light and tie between ground and hot wires for pump?

Pulled fuel pump and filter since I heard nothing--bench tested it--nothing.

Any ideas of pumps that don't break the bank that are reliable. Aftermarket may be the choice for now--haven't had the project running yet so trying to watch $$$$ until I heard it run.


Going to drop the tank and give it a bath. Is taking the hose at the top a pain in the butt or does it stay on tank when you drop it?

How the heck do I get to the ground wires behind the air conditioner evaporator tank -behind the radiator--in the slimmest of areas on the front passengers side?

Just checked mail---repair CD came in--hope it isn't poor quality like the one I purchased for my 1977 911 targa.
Old 07-25-2012, 01:39 PM
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I will pull my latch and snap a picture of it next chance I get so you can compare it to yours
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Old 07-25-2012, 06:08 PM
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not technically speaking, others to chime in when specific tech needed for you.

your brown wires connector looks like it has a broken tab in it, and its actually a female connect ,see pic 3.

pass side grds above fuse panel remove brass bracket remove blackbox/the pin connector to the black box has a clip over top, if that opens when disconnecting from box to pin clean - all of the wires will come out and youll be crying,lol. be careful and have camera take pic in case they go flying, and remember the like of any connector anywhere going forward.
the ball of grds remove nut/ clean. pic 1

did you clean from a-z bottom of fuse panel the colorful wire collection of boxes. each one pulled will have a letter on the side, cleaning and making sure no wire loose/missed their spades. when connecting any make sure female ends dont close and miss connection, as well any too loose crimp.

the fender well plastic panels forward the front tires remove to access any headlight/signals grds. may have to move/raise hlight buckets to access.

rad grds pass side end of hlights bar/squared piece pic2 reach around squared piece feel for bolt. that one might have the nut you have to tighten from front , cant remem. 14 pin connecter back from this grd, crucial big one to clean and or repair thorough inspection needed.





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Old 07-25-2012, 06:31 PM
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Quote:
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David,
I believe the double brown wire goes into a white connector with 4 other wires. The purpose of that connector escapes me at the present time. I am thinking it is the harness for the rear remote hatch release?
I knew it would come to me eventually. That connector is for the rear wiper relay. It is sure hell getting old. I can't believe I couldn't figure that out before. What a dumba$$ I am getting to be.

I do believe the other wire is the ground to the rear wiper case though.
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Grand Prix White 1994 GTS AT (The GTS)
Cobalt Blue 1989 S4 AT (The Blue Car)
Indishrot 1984 Euro S AT (The Stepson)
Black Metallic 1984 Euro S 5 speed (The Schwartz)
Old 07-25-2012, 08:41 PM
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Cool Great pics and help.

So things for the weekend:

1. Remove all colored plug ins and clean/inspect.
I have R&R all fuses and cleaned contacts--got a few more items getting current.
Grounds above fuse block, battery, engine/frame, drivers side upfront are done.
Is the ground at steering difficult to locate and R&R--now I know the passenger side front will be fun-ya right

2. Pics should help complete rear brown wires although I will pull both rear side panels and see what is lurking behind them. How do you "POP" the panel clips? Have seen many different styles and trying to not BUST anything up--lol

3. Getting a thump when sunroof switch is pushed--frozen motor? Will look on how to open it up manually and clean up--could be frozen from sitting outside for 3 years under cover/heat/crap etc.

4. Fuel pump----$250 for a Bosch--r u kidding me. Going aftermarket to get it running first. Because it is for a Porsche they 4x the cost--thieves--its just a fuel pump--no titanium of gold used

5. Dropping tank even though it was bone dry. Poured 1 gallon through it and it can out clean but figured everything is dried up. Figured having the pump off may as well go the next step. Going to clean with TSP after inspection.



Thanks for jumping in--just ordered pump and filter, Bosch cap/rotor, and air filter.
Old 07-26-2012, 05:15 AM
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stepson mee too.

absolutely miracle happen when you clean r r cheaper , patience focus work rewards, pcar varoom.

steering grds - flip over upside down under there straight up righthandish/doorside the ball of grds. tray at knees, tray under wheel lever adj may or may not need removal if so couple screws, mm nut driver... i forget if access/in sight for the grd anyway may/not luckout.

left foot dead petal bolt backside unhooks/ like in front , box/connectors clean.
any control boxes if connector cleaning fails you may have to get more extensive opening them to the printed circuit boards and resoldering/reflowing once you pinpoint a inop control switch.

all any black plastic clips get as close as possible to pull em, theres a tool to buy, a screwdriver.... you can buy to replace/screw in broken/brittle/stretched clips, but if they break away what holds the head in, then your in a world of hurt. epoxy/fiberglass reholeing or the not possible places and have to drill self tap screws in. whatever create way.


sunroof thump you pulled panel above back seats lube motor/ hold rag for drips?.
motor will have most power if roof just a bit bound. make sure cars on most power not just in accessory not enough power. put your hand up/push the direction your going. the thump is the plastic guides broke or too much crap to push and/or/all one guide got ahead of the other tracked crooked jammed/broke.
the entire inside roof/headliner has to come down the sroof panel removed. the tracks/cables cleaned all parts inspected replace adjusted.... and you need the whole job done with one eye -flashlight- flathand looking into a thickness of the panel.
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Old 07-26-2012, 08:44 AM
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the entire inside roof/headliner has to come down the sroof panel removed. the tracks/cables cleaned all parts inspected replace adjusted.... and you need the whole job done with one eye -flashlight- flathand looking into a thickness of the panel.
Yes, the first thing you've got to do is get the sunroof open. This can be accomplished by removing the sunroof motor/trans cover and removing the motor and transmission. You should be able to then move the sunroof back by hand taking care to keep it as straight as possible in the tracks/guides. Clean like a fiend, and then what lfausty said above. There are some very good write-ups on RL about this.
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Cobalt Blue 1989 S4 AT (The Blue Car)
Indishrot 1984 Euro S AT (The Stepson)
Black Metallic 1984 Euro S 5 speed (The Schwartz)
Old 07-26-2012, 10:39 AM
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Clips

Are the clips for the rear panels accessible from underneath--still haven't got that far but planning for the weekend. Do they push up or unscrew--caught the warning not to break anything.

Working on the electrical reminds me of the days with British Leyland--never ending tracking down and cleaning up--glad this isn't a Lucas nightmare.

Going to plan 1 week to just strip inside--pull seats etc so looking for tech directions for interior. Want to clean up floor, clean leather--redye some areas (Blue Leather) white ext. Get into doors and clean contacts and lube tracks etc--AFTER i get it running.

I do have power to fuel pump wires and ground so when pump gets here I'm going to pull out extinguisher and have a go at it.

Can all 8 plugs be pulled without yank more items?

Where can I find directions for pulling intakes--swept for an hour trying to get maple seeds and crap but have to believe that are few leaves tucked in there.

Have to fly--thanks for helping out a Porsche Virgin.
Old 07-26-2012, 11:18 AM
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I do have power to fuel pump wires and ground so when pump gets here I'm going to pull out extinguisher and have a go at it.

Can all 8 plugs be pulled without yank more items?

Where can I find directions for pulling intakes--swept for an hour trying to get maple seeds and crap but have to believe that are few leaves tucked in there.

Have to fly--thanks for helping out a Porsche Virgin.
Plugs can all be pulled independent of anything else.

Always exciting when a project starts and runs. Makes you like you accomplished something.
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Grand Prix White 1994 GTS AT (The GTS)
Cobalt Blue 1989 S4 AT (The Blue Car)
Indishrot 1984 Euro S AT (The Stepson)
Black Metallic 1984 Euro S 5 speed (The Schwartz)
Old 07-26-2012, 03:09 PM
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Getting ready

Ok so I will R & R with new plugs--cap in rotor in route. There are champions in it now--I am a NGK guy but I bet everyone runs Bosch since it's German hey--so just the standard plug to be used? What would the gap be for my 82?

I read where I should shoot a small amount of Marvel oil into chambers since she has sit for so long. Will this foul the new plugs or should I turn it over after an over night soak and with coil disconnected and fuel relay out turn it over towels tucked in to catch spray? I have spun it over some already so I would guess the clean oil in it has been pumped around.

Will get the tank out Friday and clean it up. Concerned about a slight seepage around bottom port of tank---no visual dripping. I read where this may be a trouble spot--take it off and clean screen seems like a have to and there should be an O ring I'd suppose--repair manual still not here.
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