Yes, thanks for correcting " how's to who's ", looks like it is connected to brake pad sensors and speed sensor. This is on my 1982, 5-speed, 48K miles. The speedo is not a huge issue right now. I was driving it recently and it quit. Did the trouble shooting and found no pump pressure, upon further testing it did hummmm a little. The pump was " siezed up". I decided I would take the tank down and do a complete inspection, including the tank strainer.
I found that the strainer was disconnected from the outlet nipple, I probably sucked in a piece of dirt that the pump could not digest, because of the missing strainer. With the sender, strainer and filler cap removed, I pressure washed the inside of the tank and refurbed the holding straps and brackets with new paint and neopreme pads.

 

My rules, never cut or pierce a wire in a harness, if it is bad, get a new one, if one can not be bought, do your best to make it look like it has never been touched and that it cam that way from the factory.

And yes I need a new harness for the engine compartment on my 87, all of them.
I also need the ABS harnesses at the wheel wells.

 

I think the problem these cars ran in to is aftermarket parts weren't available for quite a while and the Porsche replacement parts were too expensive. This lead to hokey fixes just to keep the cars on the road.

 

How'd you get my car?!

Seriously, I must own up to some repairs like that, but I own a soldering iron now and considerably more knowledge (and pictures of burned 928s).

 

Ahhh, quit your bitchin'. As long as you don't find a head in the spare tire well, you're fine.

No seriously, get the pitch forks and light the torches...

 

Odo fraud IMO... Where did you buy this gem?

 

I too hate this problem with a passion that burns like the fiery heart of the sun. Apparently an upgraded alternator makes it go away though, so I'm gonna get a CS-130 and one of the aftermarket kits to boost it to 140 Amps and call it a day. There's a lot of info on it if you poke around, the most complete post being found below.

https://rennlist.com/forums/928-foru...onversion.html

 

One word of warning this did not solve my idle charging issue. I used the old pulley off the Porsche alternator. The pulley is the problem the alternator doesn't turn fast enough at idle. Someone needs to find a different pulley to increase the rotation speed at idle. You have been warned.

 

Yeah, I was planning on using the small pulley off of the alt on the car now along with the high-cap alternator. I figured that no matter what it would put out enough current to charge the battery. Did you use the conversion to bump up to 140A?

 

No it charges fine at higher RPM idle is the problem. Porsche used an undersized crank pulley so the add ons wouldn't be over driven at autobahn speed.

 

Did you get that 140 amp conversion though, or did you stick with the stock 105 amps? Recall that porsche offered a 115 amp alternator as an option, apparently. Since the true output is not actually 105 amps, it wouldn't surprise me if the idle current is insufficient, as it's nominally 10 Amps under stock