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onZedge's Avatar
 
Join Date: Aug 2005
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Exclamation Car won't shut off!!

Pulled the car into the garage to do the rear brakes. Turned the key and the car stayed running, and the charge light came on. Now, unexpected events like this is exactly why I installed a 100 Amp circuit breaker with with a manual trip button. The ironic thing about all this is that yesterday, I just ordered a bunch of tune-up parts for my Wife's E34 and I added a new ignition switch for my 924S at the last minute. I figured it was a wear item that probably needs to be replaced since it's 20 years old. Go figure!
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Old 06-21-2007, 01:14 PM
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A wiring problem with the ignition???

I just added power locks to my 944 and one wire on the relay was wired wrong. The car didn't shut off right away, it took a few seconds till it shut itself off.
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'87 944 N/A (first Porsche)
'95 E-350 Diesel
'03 S-Type Jag 3.0
'03 Taurus SES
'06 Eddie Bauer Explorer

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Old 06-21-2007, 01:22 PM
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Car won't shut off!!
Wierd problem, I have a car that wants to start its self with the battery installed with the keys still in the house on the key rack, these cars must be possed. I`m calling for an exorcism you in? KIDDING
but my car really does that, so I pulled the battery and put it on the work bench, and will remove the remote start/alarm system before I put the battery back in. Look to your ignition switch and clean all grounds
and clean all chassis grounds while you are at it.


__________________________________________


1986 944 NA Black with Burgundy Leather


RIP SoCal Driver, God Speed
Old 06-21-2007, 03:56 PM
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If you look up "immaculately clean grounds and battery terminals on a Porsche 924S" you will find a picture of my car there.

Another reason I ordered a new ignition switch was the radio cut in and out when I moved the key from STOP to RUN or START. It also cut in and out if I jiggled the key in the STOP position. I don't think it's supposed to do that. Anyway, since a new switch is coming, I'll replace it first before I waste any time troubleshooting electrical gremlins.
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Last edited by onZedge; 06-21-2007 at 07:07 PM..
Old 06-21-2007, 06:58 PM
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Hello There:

Sounds like something I am troubleshooting as well.

Have you guys run into this? Where the lights go out and the electrical console (dash) power, windows, etc. etc. go out when you turn the key to OFF, but the car keeps running since the fuel pump is still active??

This is happening in a 87 944 I have been restoring. I too thought it was the ignition switch, so I replaced the ignition switch only to find that it still does this. And, I do mean...it keeps running until I physically go to the back of the car and unhook the fuel pump connection.

Am I missing something about these cars??

Thanks.
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1983 911SC
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Old 06-21-2007, 09:18 PM
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Most likely the cheap part on the ignition switch that is for sale everywhere. Even here. http://www.pelicanparts.com/catalog/shopcart/944M/POR_944M_ELswch_pg2.htm#item2
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Old 06-21-2007, 09:34 PM
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Ed, if you replaced the ignition switch and it still runs when you turn the key to STOP, I would next look at the DME relay for a welded contact set (I had two A/C relays fail this way). I guess I could do that while I wait for FedEx (ground) to deliver my new switch...

BTW, the switch is the same part from a '87 Sirocco or '74 Super Beetle and I'm sure others, but at $4.50, I'll get another spare to stick in the glove-box. Right next to my spare DME relay.

I have one of these installed between the battery and the three ~10 gage wires that used to go to the battery positive cable. It is a LOT more convenient than unbolting the battery cable when doing maintenance on your car. Just push the button and you are disconnected - and safe.

http://www.bussman.com/pdf/15e0468b-2837-4360-aeb8-6d391d3f173b.pdf
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Last edited by onZedge; 06-21-2007 at 10:05 PM..
Old 06-21-2007, 09:44 PM
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Sometimes you get a bad part, look at the relay for problems as well.
OnZedge, as I recall the 924s is the same as the early. When you put the key in, the antennae and radio come on, if the radio unit is turned on. They stay on, or should thereafter. Does your antennae drop while moving the key during the cranking process?
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Old 06-21-2007, 10:02 PM
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I have a manual (non-electric) factory antenna.
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Old 06-21-2007, 10:08 PM
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Maybe I'm learning. Thought the 924s was the same as an early car, but w/out the bigger fenders, and the antannae is in the same place.
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Last edited by mattdavis11; 06-21-2007 at 10:22 PM..
Old 06-21-2007, 10:20 PM
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Thanks, guys!

I will check into this over the weekend and report back what I find.
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1983 911SC
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Old 06-21-2007, 10:51 PM
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They changed the power antennae over to the in the windshield antennae I think at 85.5. It only says on the FAQ that the early 944's have the power antennae.
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'87 944 N/A (first Porsche)
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'03 S-Type Jag 3.0
'03 Taurus SES
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RIP SoCal
Old 06-22-2007, 06:12 AM
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Troubleshooting Clarification

Ed, I studied the schematic for my car (and your '87 944) and saw that the coil gets power ONLY from the ignition switch. So with the keys out of the ignition, I checked for continuity between the positive battery terminal (in my case, the switched side of the main circuit breaker I added) and the hot terminal (black wire) of the coil. Sure as s#!t, I have continuity. I definitely have a bad ignition switch.

OK, on to your car. You say you changed the ignition switch and it still runs when you shut it off?? Do you mean it diesels because the fuel pump still runs? Or, like my car, it idles as if I never switched the ignition off? If it just idles, try the above test. If it diesels, take the keys out and check for continuity between the positive battery terminal and the fuel pump fuse. If you have continuity, the secondary contact set of the DME/Fuel Pump Relay is probably welded.

One more question. You said you were restoring your car. Have you found any butchered wiring during your restoration?

Please report back.



You can get this circuit breaker at most big-box auto parts stores for about $40. NAPA has 'em for $54.
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Old 06-22-2007, 10:11 AM
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Glad to see it was a quick fix!
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'87 944 N/A (first Porsche)
'95 E-350 Diesel
'03 S-Type Jag 3.0
'03 Taurus SES
'06 Eddie Bauer Explorer

RIP SoCal
Old 06-22-2007, 10:14 AM
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[[[They changed the power antennae over to the in the windshield antennae I think at 85.5. It only says on the FAQ that the early 944's have the power antennae.]]]

Icey1174: My car is 1986 944NA With Power Antennae in the right rear quarter panel, it does not work well but its there.

--------------------------------------------

1986 944NA Black with Burgundy Leather


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Old 06-22-2007, 10:35 AM
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Maybe it was Feb of 86 and later like the sunroof. Mine is an 87 and it's in the windshield. Clark's only says "early" 944. I guess I awlays think of early as 85.5 and newer.
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'87 944 N/A (first Porsche)
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RIP SoCal
Old 06-22-2007, 10:39 AM
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Edek:

YES! My car acts as if I never turned it off. I am going to double-check this and a few other things over the weekend and report back.

Yes, I have found butchered wiring on some of the wiring blocks that attach to the underside of the fuse box. What the hell is that about?? So I am replacing with new.

I must admit I was saddened by this fact. Why would someone commit such an act of violence toward this German work of perfection? It is almost like someone said to a group of young 5-year olds, "hey kids, want to learn electronics? Here's a voltage tester....go for it."

AND, they didn't even leave me a note to let me know what the heck they were thinking or trying to do.

Anyway, I am going through the entire car and making it right for the next owner and documenting every bit of progress for a history. That way, (at least I hope so) they will have it like the Porsche factory intended.

Like I said, I will get a progress report back to you (all) in a day or sooner.

Ed
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1983 911SC
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Old 06-23-2007, 12:03 AM
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All that hard work and you don't want to keep it?!?!?!?!
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'87 944 N/A (first Porsche)
'95 E-350 Diesel
'03 S-Type Jag 3.0
'03 Taurus SES
'06 Eddie Bauer Explorer

RIP SoCal
Old 06-23-2007, 06:26 AM
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Quote:
Originally posted by Dana Norris
[[[They changed the power antennae over to the in the windshield antennae I think at 85.5. It only says on the FAQ that the early 944's have the power antennae.]]]

Icey1174: My car is 1986 944NA With Power Antennae in the right rear quarter panel, it does not work well but its there.
Then someone has hacked up your car.

All 1985.5 and later 944 variants came from the factory with the antenna embedded in the windshield. If you have the antenna in any other location, it is an aftermarket item.

If I had to guess, I'd say that a previous owner had to replace the windshield, balked at the price of a factory windshield with the embedded antenna, and chose to use a cheap windshield and cut a hole in the rear fender for a cheaper antenna.

The 924S and early 944 have the antenna in the left front fender, a power antenna was optional, but many are simple manual antennae.
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Old 06-23-2007, 11:13 AM
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[[[If I had to guess, I'd say that a previous owner had to replace the windshield, balked at the price of a factory windshield with the embedded antenna, and chose to use a cheap windshield and cut a hole in the rear fender for a cheaper antenna.]]]

AaronM:
Thanks for the input, cutting a hole in the rear quarter panel, then running an antenna cable to the rear of the car seems like a lot of work.
Is the proper windshield that much more than a windshield with out the antenna?


------------------------------------------

1986 944 NA Black with Burgundy Leather



RIP SoCalDriver
Old 06-23-2007, 11:24 AM
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