reverse lights

[e30wavee]

hi i have a 1990 bmw 325i its a 5spd everytime i put the car in reverse the reverse lights wont go on what could cause this problem its not a fuse or bulbs need help someone help me !!!!

[redsubdivisions]

Sensor in the transmission. Hope you have small hands and a thin wrench.

[e30slidewayz]

I had the same probs. Checked fuse and bulbs which were fine. I changed the reverse sensor on the transmission, it wasn't too bad of a job. But, that didn't fix my prob either. It ended up being a cut wire under the car that runs to the shifter... saw it when I put it up on the lift for some suspension mods. However, for you it's most likely the reverse sensor on the trans.

[e30wavee]

thanks guys where can i find a reverse sensor i check bravarian sport and ecstuning doesnt seem like they have that part in stock should i just check bmw dealership ? and how much would this idea cost me

[efficient]

http://www.bmaparts.com/ShopByVehicle.epc?q=&makeid=bmw%40%40BMW&yearid=1990%40%401990&modelid=325is%40%40325is&pttypeid=back-up-lamp-switch@@Back+Up+Lamp+Switch&mode=PA

[e30wavee]

thanks for the help everyone hopefully this will work

[mcaden]

You may want to check a couple of things first.

1. Pull up your shift boot and make sure your reverse switch isn't disconnected.

2. Go under the car and make sure the reverse switch wiring isn't rubbing against the driveshaft and either frayed or broken. If the wire sheathing has been worn off... it will short out your reverse lights when it touches the driveshaft. Many POs will simply disconnect the reverse switch at the shift boot rather than repair the wire or keep replacing the fuse (ask me how I know). If this is the case, replace the fuse, reconnect at the shift boot, repair the frayed wire, and then zip tie the wire so it no longer rubs against the driveshaft.

3. If all else is okay, then go ahead and replace the reverse switch.

Good luck.