Headlight motors question

[jrich4411]

I reinstalled the headlights & connected them up today. When I turn the light switch on, the lights illuminate as they should, but the motors go into a continuous cycle - up, down, up, down etc. I vaguely recall reading about this issue in the past but I can't find any info on it.
A little history - the headlamp pods were completely disassembled, cleaned & reassembled, but the motors themselves were not cracked open.
Any info and/or suggestions is greatly appreciated!

Jon

'80 DHC
Chevy V8 up front
Ford rear end down back
Lucas wiring all over

[john 215]

Hi Jon,

Is it one or both headlamp getting ' Funky ' ! ?

Would as a first step check all connections behind the headlamps and the earths at this point.

Did this problem occur only after rebuilding the units ?

Cheers John


LIVE LIFE A QUARTER OF A MILE AT A TIME!

1976 Speke FHC Beauty Now with an overdrive conversion

1979 3.5 FHC(STATUS PENDING!!)

1982 2.0 DHC NOW A 4.6, BUILT NOT BROUGHT !!!!

[jrich4411]

John, the issue is occurring with both headlights. They worked fine when I removed them from the car 5 1/2 years ago when I began the restoration. This the first time they have been back in the car since I took them apart for cleaning

'80 DHC
Chevy V8 up front
Ford rear end down back
Lucas wiring all over

[TR Tony]

Jon, if you have not disassembled the motors then it is not so likely that there is a problem with the limit switches in both motors at the same time.

Apart from the engine bay earths, the earths for the run/stop relays in the fuse box area would be a good place to check - if the relays don't earth then the pod motors will keep running.

If you can follow electrical circuits then this is a very helpful explanation of how the lights work:

http://www.team.net/TR8/tr8cca/wedgelab ... lights.htm


Tony

<font size="1">1981 TR7 FHC Cavalry Blue
1980 TR7V8 DHC Jaguar Regency Red - sadly sold!
1977 TR8 FHC EFI Factory development car Inca Yellow</font id="size1">

[sheetsofsound]

In case you haven't solved this yet... If its not the earths for the limit switches and the lights go up and down for 5 minutes of so and finally stop in the up position, then perhaps the diodes in the circuit need to be replaced. I had a friend with this problem years ago and replacing the diodes was the solution.

[seven]

After 5 1/2 years without use, I would be going up and down too [:D][:0][:I]

Triumph TR7 DHC
Triumph 2.5 Estate
Bentley Turbo R RL
Mercedes 320SLK
Jaguar X-Type Estate
Kawasaki GPZ

The car is unable to handle my driving capabilities