tailpipe

Ok yes I did a search and didn't seem to find any definite answer i'm working on my 79 euro the lights light up with the switch but the pods don't come up the motor works if i jump the relay socket but i don't seem to have any voltage in the X tab in the safety relay but i do have voltage at the A3 socket coming from the ignition switch has anyone else had anthing like this and how did you fix it ?

thanks
Paul

tailpipe

update: I tried a new headlight switch with no change and tried replacing all the relays with no change anyone have any sugestions ?

Ethre

Odd. The design must be set up differently on the 79 - because on my 82 the headlights won't light unless they are physically all the way up. I think it must be some sort of contact switch they close when up.
Unfortunately, I can't tell you anything other than that.

unitfreebie

I have a 1978 model and the headlights pops up but do not turn on! All fuses are good... anyone have any suggestions?

Thanks..

tailpipe

that shouldn't be to hard unitfreebie there are only a few things to check first before anything check and make sure that the lights themselves work and are plugged in it sounds simple but i had one that both weren't plugged in because the euro plugs didn'y fit the US lights a few mins with the file and all worked perfect next check the fuses there are two for each side one highbeam one lowbeam check with a test light make sure there is power at both contacts on pannel not the fuse if you have cheap aluminum fuses replace them with copper or brass right away after that check the relay by jumping the terminals if you still don't have lights next see if you have power coming from the headlight switch after that its all down to testing the wires themselves check the grounds first and work towards the battery thats about it. good luck .i'm sayin relay let me know what you find


Paul

Leon Speed

I seem to rembember Landseer had a similar problem. Might want to check with him.

Mike Frye

I'm going with the standard Jim Bailey mantra: Relay, relay relay.

I had a weird problem with my headlights when I first got the car. The headlights would go up and light but not retract.

In that link you can get some of the voltages that I was seeing on different pins (although this is for an '85 so they may not be the same as yours, I don't know).

Bottom line: It was the headlight relay. I know it's an expensive one, but I got a used one from 928Intl, popped it in and haven't had a problem since. I'd try that first rather than last since the worst that could happen is that you end up with a spare headlight relay and the best is that it fixes your problem.

tailpipe

hi mike i have already replaced the relay with a new one and one from another car the relay checks out i also did the same with the headlight switch it checks out ok also i think i'm going to try the limit switches and diodes next will try to pick some up later today

jwillman

I had/have a bit of a different problem with my 79. Turned out my ignition switch positions are a little vague (new switch in my future) and I have to manually return it to the run position to get lights working with engine on. There is an X signal from the ignition switch to the light circuit. As you have tried light switch and relays perhaps you should look at this.

https://rennlist.com/forums/928-foru...te-solved.html

Mike Frye

Sorry, my bad. I now see that your second post listed that you'd replaced the relay.

Yeah. When you open up the headlight motor assembly watch out for a ball bearing that will fall out if you're not careful. Once you see the assembly the operation of it will seem clear. I think in some cases people have cleaned up the disk with some success. It's conductive and has a tab that has to complete the circuit to feed voltage back to the relay when it's in different positions. Once everything is clean then it makes sense to start checking components.

My motto for anything mechanic is that it's not broken until it's clean and broken.

unitfreebie

Hi Guys....

Many thanks for the tips on getting the headlights to light up.

I'm much in agreement that it's probably a relay but there are about 5 relays related to the Headlights, so need some help in narrowing it down...

From this relay - fuse chart for my 1978 model: https:

//www.928gt.com/t-7879fuse.aspx

The relays are:

Position # Description P/N
III Headlight Motor 928.615.116.00

IV Headlight Pwr Sup 928.615.127.00

XIII Hi Beam Power 928.615.119.00

XIV Hi/Lo Headlights 928.615.123.00

XVI Headlight Safety 928.615.116.00

also VII which is the Headlamp Washer relay, but that should not be the problem?

I might add that the fuses #24 thru 27 (8A's) are all OK and tight in the socket, but don't recall if they were aluminum.

I did check Relay XIV (Hi/Lo Headlights) because I thought the double-pole contact was bad (no low beam) but the relay checks out with a battery and ohm meter and only had a single-pole contact!

I wish I could swap it with another relay, but it is unique as is Relay XIII (Hi beam).

I might add that maybe 20 years ago I did change out the original DOT headlamps for the brighter European lamp assembly which worked fine until recently.

I'm the second owner of the car which I got in 1981 by trading my 1968 911S (yes, gray market, but fast!) for it because my wife was expecting and she said to get a family car! It's a garage Queen now with about 78,000 miles on the clock.

Oh, speaking about clocks, the analog clock has stopped working a few years back... is there a fix? I don't mind taking it apart if you think it is fixable?

So what do you all think?

-Mike

tailpipe

ok if you have high beams but no low beams its prolly the hi/low relay as for the clock hit your local bone yard a look for a VW cabriolet they use the same clocks i think the audi 4000 and bmw from the early 80s also use the same clock make sure it works before you buy it and make sure you have power to yours and its actually broke before you buy another one. good luck

tailpipe

ok pulled the headlight motor and checked power flow and diodes all checked out ok will have to start chasing wires now anyone have anything like this ever happen any places to start looking ?