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Reverse backup lights fixed ... finally 200 1993

Wanted to post my journey to repair my intermittent backup lights. Doing my part to pay folks back for their help on this forum.

Symptoms:
- Sometimes worked okay, other times nothing
- Sometimes moving the shifter handle forward a bit worked

General info
- Two years ago I had replaced the start inhibitor/back-up light switch (the wedge to the right of the shifter in its housing). Aftermarket. Not Volvo
- Performed the standard inspection of fuses and bulbs

Fixes (yep as in more than two in my case):
- Figured the switch was out of adjustment so I tried that. No lights whatsoever
- Pulled the switch out. Not good. Two wire's soldered joint's had failed and another was on its way. Re-soldered all the connections
- Retested. Lights are now intermittent
- Opened the switch and cleaned the contacts. It did not look good in there for a 2 year old switch.
Retested. Better. Lights are still intermittent then won't work at all
- Insert your favorite expression. Charlie Brown's was "RATS!"
- Went to the light assemblies, took hold of the connector and "Let there be light" without removing. Wiggled them some more and found a third issue
- Pulled the connectors and found some corrosion. Corrosion-X to the rescue (love this stuff).
- lights are now fully operational

All the best.






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