We have an Manual V6 '89 Silverado RWD

ALEDRO89

MEMBER
1989 CHEVROLET SILVERADO

We have an Manual v6 '89 Silverado RWD. The reverse lights aren't coming on when the vehicle is put into reverse. The bulbs are good, fuses are good, and power/ground are good. We bridged the two wires that lead to the back up lamp switch and the lights do come on. Is there possibly something internally wrong in the transmission where the switch goes into? Thanks for any help

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ALEDRO89

MEMBER
4 POSTS

Ill have to check in a few. Is this switch on manual transmission vehicles too? If that switch is bad, would the lights still get power when the backup light harness is bridged?

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Monday, October 29th, 2018 AT 7:03 PM

HMAC300

MECHANIC
48,601 POSTS

I screwed up sorry on a manual it's on the clutch pedal bracket

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Monday, October 29th, 2018 AT 7:03 PM

HMAC300

MECHANIC
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The switch has a button tha tis pushed when it is put in gear it rides against the shifter rail to push the button in and then when out of reverse there is adetent that the ball goes into, Your truck would not be able to go into reverse if the shift rail was broken, maybe it's worn out and causing this. I would take the washer off the switch if there is one on it and put it in the trans like that without the washer to see if it will go in farther or not. Both the 4 speed an d5 speed work the same way. As long as the switch gets power and it goes through then the lights should work. Make sure to check the connection or put power to one side of switch then test other side of switch to see if power is going through, it may be just a poor connection there that is causeing your problem.

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Monday, October 29th, 2018 AT 7:03 PM