Still no reverse lights
Thread Starter
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Tuned
Joined: Mar 2014
Posts: 319
Likes: 18
Still no reverse lights
Replaced fuse in cab, #5-15 Amp, checked bulbs, checked fuses under hood, disconnected DTR, jumped pins 9 and 11, and others, cuz there's so many diagrams, can't figure out which wiring diagram is correct. Anyone like to take a crack at this ???? Thank you ! 2003 F150.
Thread Starter
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Tuned
Joined: Mar 2014
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Yeah, that's what I jumped out , pins 9 and 11. Lights did not come on. Seems they should with those pins jumped out ? Running out of ideas. Sounds like a somewhat common problem. HELP !! Anyone out there got any more ideas ???
Fleet Mechanic
Joined: Jul 2010
Posts: 1,354
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From: Winnipeg
Then jumper pin #9 to pin #11 with ignition in run position. Are the reverse lamps working? Yes, dtr switch defective. No, While still jumped go to reverse lamps and remove both bulbs. With test light on known good ground, probe for power from inside the lamp socket. Test light lights, good circuit. Test light doesn't light, bad wiring from dtr connector to lamp sockets.
Test for good ground, Supply 12 volts, preferably fused, to test light clip. Probe the ground wire in each socket. Test test light should light for each indicating a good ground circuit. The ground for the reverse lights is attached to the left front radiator support.
Note; There is a splice for the ground circuit, S401 as well as 2 splices, S130 and S401 between power circuit pin #11 and lamp socket.
Thread Starter
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Tuned
Joined: Mar 2014
Posts: 319
Likes: 18
Still no reverse lights
It's as simple as that. Use a test light, hook alligator clip to good ground. then probe both sides of fuse 5 (hot in run). Both should light. Then disconnect dtr connector. Connect test light to good ground and with ignition in run position probe pin #9 of connector. Test light should light.
Then jumper pin #9 to pin #11 with ignition in run position. Are the reverse lamps working? Yes, dtr switch defective. No, While still jumped go to reverse lamps and remove both bulbs. With test light on known good ground, probe for power from inside the lamp socket. Test light lights, good circuit. Test light doesn't light, bad wiring from dtr connector to lamp sockets.
Test for good ground, Supply 12 volts, preferably fused, to test light clip. Probe the ground wire in each socket. Test test light should light for each indicating a good ground circuit. The ground for the reverse lights is attached to the left front radiator support.
Note; There is a splice for the ground circuit, S401 as well as 2 splices, S130 and S401 between power circuit pin #11 and lamp socket.
Then jumper pin #9 to pin #11 with ignition in run position. Are the reverse lamps working? Yes, dtr switch defective. No, While still jumped go to reverse lamps and remove both bulbs. With test light on known good ground, probe for power from inside the lamp socket. Test light lights, good circuit. Test light doesn't light, bad wiring from dtr connector to lamp sockets.
Test for good ground, Supply 12 volts, preferably fused, to test light clip. Probe the ground wire in each socket. Test test light should light for each indicating a good ground circuit. The ground for the reverse lights is attached to the left front radiator support.
Note; There is a splice for the ground circuit, S401 as well as 2 splices, S130 and S401 between power circuit pin #11 and lamp socket.
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