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1987 3.2 targa brake light fault

Colin mccashey

Colin mccashey

PCGB Member
Member
There is a fault on the nearside brake light on my 1987 3.2 targa. When the brakes are applied with direction indicator on, the brake light flashes in sequence with indicator. Tried to locate faulty earth without success. Suggestions welcomed. Thanks
 
The bulbs are all good, but the vehicle has been in storage for 5 years. MOT preparation ongoing, hence identification of problem with brake lights. Thanks for your response. Regards
 
If you get hold of a legible dircuit diagram for that area, I'll diagnose it for you .. [8|]
 
Hi Colin
Try remove the lens cover and use a test lead from earth on the engine
to the metal part of the stop lamp bulb if everything works you have a bad earth.
You may have to remove the lamp assembly and the rear cover
of the lamp assembly check all the brown wires for earth.
I guess corrosion some where.

Charles.


 
Thanks Maurice. I do have wiring diagrams in the rear section of the Haynes repair manual for models 1965 to 1989, but to be honest they are barely legible, especially as I don’t really know how to read them. I could try and copy them but I suspect they will be even less legible and they run to 47 pages. Some pages are for US spec, and the others cover models up to 1985. If you think it is worth copying them then I can scan what I think are the relevant pages and email them to you. Just let me know what you think. Thanks again. Colin
 
Hi Colin

I have an 81 SC and had one or two issue's in this area - think one was the brake light.
Mine was a broken earth eyelet fixed on a stud. It was located high up inside the rear wheel arch towards the rear of the light cluster - where it gets narrow! Was easier on the car lift with wheel removed to get to it than taking out the light cluster.
The eyelet was orientated so the crimped wire doubled back at 180 degrees and was under strain - finally the smaller brake light wire broke but was hidden out of sight by 2 larger wires also crimped to same eyelet making you think ALL was OK!

I remade and reorientated the eyelet for all three wired in it.

Hope this helps. Best regards


Neil
 
After sitting for 5 years my guess would also be a corroded bulb holder, take all the bulbs out and check voltage, may as well renew the bulbs too!
 
Not for the first time I would thoroughly check out T911s suggestion, that is exactly what 993s do, a good clean of the inevitable corrosion will fix most things ..

cheers, Maurice
 
Hi Colin,

I had all sorts of issues with the rear lights on my targa when I first had it. Fixed by re-terminating the cables including the the earths and replacing one dodgy bulb holder, I had the added complication of seals around the light lenses being totally past it and letting in moisture. Luckily there was always sufficient cable length that I could trim 2cm or so back without issue. I considered it a short term fix before biting the bullet and getting a new loom at some point in the future, parts of the loom are quite exposed in the engine bay.

Best of luck, Ben
 
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