Blowing (R) parking light fuse

[timmy2]

PM (private message) me your phone number and a good time to call tomorrow, and I can talk you through any questions you have.
Just click my username to get to the PM's

[CarlosDanger]

Originally Posted by timmy2

If you are going to be up for a little bit yet tonight PM me your phone number and I can talk you through any questions you have for the next 1/2 hour or so.

I already called it a night but I really appreciate it. I'll be working on it all week probably if another night works for you. I'll PM you my number.


Sent from my iPhone using Tapatalk

[timmy2]

Originally Posted by CarlosDanger

I already called it a night but I really appreciate it. I'll be working on it all week probably if another night works for you. I'll PM you my number.


Sent from my iPhone using Tapatalk

Already edited my post.

[Tylermelvin]

Originally Posted by CarlosDanger

Well not much luck. The tail light assembly is pretty much rusted shut...



And my car had a whale tail delete, so no engine compartment light.



The wiring out side of the assembly looks alright.



Seems like next steps might be to get into the assembly which I may have to replace after.

I don't see any obvious wires dangling around where the engine compartment light would be.


Sent from my iPhone using Tapatalk

Dunno how old this **** is, but spray the **** out of the screws with WD-40 rock left n right, spray again, work till it comes out. Mine look the same, then pry the ends out. I got mine open you can get yours

[b0rderman]

Topping an old there here, I just bought a 70 911E with very similar symptoms. I also posses similar levels of electrical know-how as the OP had when he started this thread…and even worse I am brand new to the aircooled world.

I have a test light on the way that can help me do some solo jiggling of the harness where I can get to it.

Timmy, do you remember where he ultimately discovered the short? I unplugged the taillight at the engine bay 6-pin connector and the parking light fuse still pops. Is there anywhere else further upstream I can unplug? Is there a 6pin connector at the front firewall? Do you all call it a luggage wall ?

Sometimes the fuse pops right away when turning on the lights with engine on and off, sometimes it survives being turned on when the engine is idling. It never survives a back-out of the garage.

I appreciate any points in the right direction. Thanks

[timmy2]

Wiring to the tail lights are a direct run through the tunnel from the fuse panel.
I hope you added a good ohmmeter to your test light order, as the test light only works when there is power. Once the fuse blows you need an ohmmeter.

Old thread, can’t remember the solution as the OP never posted it.

[darrin]

isn't the interior rear deck lid light fed from the right rear parking light circuit? Do you still have a rear decklid light installed and does it work when the cover's opened?

[timmy2]

On later years yes, not likely he has one on his 70 model.
May be his license plate lamp harness.
Need more info on what is really going on such as which fuse number is blowing.
Parking light? Running lamps? Need to know what circuit is acting up.
Info that would really help.
Even just the color of the wires at the blown fuse terminals would start the clues.

[b0rderman]

It was my lower fuse 6 (Parking Light Right) that kept blowing. They had an 8amp fuse in there, but I now see that it should be a 5amp. When I saw it labeled as "parking light right" I made the incorrect assumption that it only served the taillight. As you all know, the circuit is for the front and rear parking lights. I unplugged the 6pin for the front right lights and I had no issues with a short to ground.

I removed blinker assembly and looked at the state of the wiring harness inside the bodywork...it wasn't pretty, and it was touching the aftermarket oil cooler in places...but it didn't look like I had any shorts. I then disconnected the wiring to the blinkers/parking lights and noticed that the ground connector pictured below (not my picture) was most likely not secured on the mounting screw and instead resting on the exposed red/grey in there.



I couldn't be certain because I disassembled and disconnected the blinker a little too quickly to realize there was something to be paying attention to while doing it. I am missing one of the plastic tabs/uprights, so I bet it wandered off...but, just to be certain, I re-wrapped the harness from the headlamp and blinker all the way to the female 6-pin, and made certain that the ground wire was on the screw when reassembling.

Very wordy here, and it's basically a simple tale of inexperience...but maybe it will help someone in a similar position down the road. Everything in that circuit is working as it should. Now on to my dash to fix my tach light, left turn signal indicator arrow, and parking brake indicator light. And also I need to improve my headlight installation skills, I couldn't get it seal as perfectly as it what when I took it off.

Thanks for your helpful replies.

[Locker537]

I chased a similar issue and the root cause was the wires were flipped at the headlight.

911SC - Passenger tail light blowing the fuse

[timmy2]

Originally Posted by b0rderman

It was my lower fuse 6 (Parking Light Right) that kept blowing. They had an 8amp fuse in there, but I now see that it should be a 5amp. When I saw it labeled as "parking light right" I made the incorrect assumption that it only served the taillight. As you all know, the circuit is for the front and rear parking lights. I unplugged the 6pin for the front right lights and I had no issues with a short to ground.

I removed blinker assembly and looked at the state of the wiring harness inside the bodywork...it wasn't pretty, and it was touching the aftermarket oil cooler in places...but it didn't look like I had any shorts. I then disconnected the wiring to the blinkers/parking lights and noticed that the ground connector pictured below (not my picture) was most likely not secured on the mounting screw and instead resting on the exposed red/grey in there.



I couldn't be certain because I disassembled and disconnected the blinker a little too quickly to realize there was something to be paying attention to while doing it. I am missing one of the plastic tabs/uprights, so I bet it wandered off...but, just to be certain, I re-wrapped the harness from the headlamp and blinker all the way to the female 6-pin, and made certain that the ground wire was on the screw when reassembling.

Very wordy here, and it's basically a simple tale of inexperience...but maybe it will help someone in a similar position down the road. Everything in that circuit is working as it should. Now on to my dash to fix my tach light, left turn signal indicator arrow, and parking brake indicator light. And also I need to improve my headlight installation skills, I couldn't get it seal as perfectly as it what when I took it off.

Thanks for your helpful replies.

Glad you found it. Nice job describing what you found.
Describing everything in the beginning of what you are dealing with helps a lot for the armchair technicians to provide input.

[silverlock]

Originally Posted by b0rderman

It was my lower fuse 6 (Parking Light Right) that kept blowing. They had an 8amp fuse in there, but I now see that it should be a 5amp. When I saw it labeled as "parking light right" I made the incorrect assumption that it only served the taillight. As you all know, the circuit is for the front and rear parking lights. I unplugged the 6pin for the front right lights and I had no issues with a short to ground.

Slight thread necro, but this helped me track down a similar issue.

RHD front parking light blew a fuse. Bulb was half blown (indicator worked, parking light did not). Fuse was (incorrectly) an 8A, replaced with a 5A, which blew immediately.

Based on this post I pulled out the reflector: my wiring was very neat, but two unused spade connectors were bare, and I suspect they were touching and shorting. I taped them neatly, put it all back together, tested ground resistance (seemed fine) and installed a fresh fuse.

All good.