Reverse Lights not working
Thread Starter
|
New User
Joined: Sep 2012
Posts: 2
Likes: 0
Reverse Lights not working
I have an automatic 5.4L (L code) 2000 Ford F-150 and I am having problems with the reverse lights not working when I place the transmission in reverse. Fuse #5 in the passenger compartment fuse panel is good and both reverse lamps are good as well. I have also metered the LB/PK input wire at DTR sensor and it is reading 12 volts when the ignition is in the on position. I have also the metered the BK/PK wire output wire at the DTR and this wire also reads 12 volts when I place the transmission in reverse. I have checked continuity from the BK/PK wire at DTR to the BK/PK wire at the reverse lamp socket and I do not have continuity. I then ran a fused jumper wire from the BK/PK wire directly to the BK/PK wire at the reverse lamp socket and the lamps will light up when I place the transmission in reverse and will also turn off when the transmission is placed back in park. So it seems that the DTR is not defective. I'm not sure what else to check. Obviously the BK/PK circuit is open at some point between the DTR and the reverse lamp socket, but I'm wondering if there is something else that I need to check. The vehicle is also equipped with a factory trailer tow package
Fleet Mechanic
Joined: Sep 2003
Posts: 1,716
Likes: 15
Great, you know what you are doing!
From the 1997 EVTM, I can track what you have done, fuse and colors the same. There are 3 connectors inline with the BK/PK wire as it travels to the rear. Could unplug each one and check there, also check connectors for corrosion/whatever.
These are the connectors they spec for the 1997 model year, hopefully your year is the same or close. The connector ID numbers listed are what they are for 1997. This is AFTER the trans range switch, in electrical order leading to the tail lights:
C172 - A Gray 38 terminal rectangular connector located underhood at passenger side firewall, the top connector under the removable black plastic cover.
C148 - A Black 16 terminal rectangular connector located underhood on the drivers side, towards the front near wheel well, they show 3 connectors running parallel near each other, one of those.
C403 - A Black 8 terminal round connector located way back on driver's side rear, by the rear bumper. From there, the wiring goes on to the light housings.
Hope this helps.
From the 1997 EVTM, I can track what you have done, fuse and colors the same. There are 3 connectors inline with the BK/PK wire as it travels to the rear. Could unplug each one and check there, also check connectors for corrosion/whatever.
These are the connectors they spec for the 1997 model year, hopefully your year is the same or close. The connector ID numbers listed are what they are for 1997. This is AFTER the trans range switch, in electrical order leading to the tail lights:
C172 - A Gray 38 terminal rectangular connector located underhood at passenger side firewall, the top connector under the removable black plastic cover.
C148 - A Black 16 terminal rectangular connector located underhood on the drivers side, towards the front near wheel well, they show 3 connectors running parallel near each other, one of those.
C403 - A Black 8 terminal round connector located way back on driver's side rear, by the rear bumper. From there, the wiring goes on to the light housings.
Hope this helps.
Thread Starter
|
New User
Joined: Sep 2012
Posts: 2
Likes: 0
Fixed!
Thanks Torky2 for your earlier post! It helped me out tremendously. I found the issue in the C172 connector on the passenger side of the engine compartment. The BK/PK wire didn't have continuity across the connector. After pulling the connector apart, I noticed that the male pin had come loose form the harness and was barley making contact with the female pin on the other side of the harness. Not really sure how this happened but it's probably been like this since the good people at Ford manufactured my truck 12 years ago. Again, thanks for taking the time to help me with this issue.
Thread
Thread Starter
Forum
Replies
Last Post
hasteranger
Excursion - King of SUVs
17
Jun 30, 2019 09:51 AM
