2002 Caravan no backup lights
Champion
Joined: Jan 2010
Posts: 3,023
Likes: 5
Gonna be kinda tough, the reverse selection from the transmission goes into the front control module which sends a bus signal to the body control module requesting backup lamps. The body control module then sends power to the backup lamps.
So you first need to know weather the front controller is see the reverse signal, then see if the BCM is seeing the request and not feeding power or just not seeing the request. you'll need a scan tool for pretty much all of it.
So you first need to know weather the front controller is see the reverse signal, then see if the BCM is seeing the request and not feeding power or just not seeing the request. you'll need a scan tool for pretty much all of it.
Record Breaker
Joined: Feb 2011
Posts: 2,256
Likes: 2
From: SoCal
> Not much faith in it but you could try pulling the IOD fuse in the fuse box (IPM) for 2-3 minutes to reset the BCM and data bus.
> The reverse switch in the Transmission Range Sensor (TRS) deep in the transmission sets the ground for the circuit when you select reverse. The connector for it sits verticle on the right front of the transmission. You could make sure it is on tight and disconnect it and check for damaged/corroded contacts. If so inclined you could check continuity through the switch in the TRS.
> The reverse switch in the Transmission Range Sensor (TRS) deep in the transmission sets the ground for the circuit when you select reverse. The connector for it sits verticle on the right front of the transmission. You could make sure it is on tight and disconnect it and check for damaged/corroded contacts. If so inclined you could check continuity through the switch in the TRS.
Last edited by Cougar41; May 2, 2011 at 02:35 PM.