2003 reverse/back up lights - Hemi Truck Club
 
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Old 08-09-2018, 10:21 AM   #1
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2003 reverse/back up lights

I need help my state inspection is due, and I have been searching for an answer to my problem. My 2003 Ram 1500 has no reverse lights, every other light functions as it should but reverse. I checked the fuse it was good, I tried new bulbs no change, I even tried moving the shifter between park and reverse and jiggling it still nothing. I am stumped I had been reading that these trucks use a ipm module and it could be that or the trs sensor on the auto trans. I'm not sure where to check next, if I check the plug at the back of the tailight for a reverse signal which wires do check for voltage? If there is no voltage in reverse at the plug would that be the ipm or trs sensor? I'm sorry for the questions I just need to get this fixed for my inspection.

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Old 08-09-2018, 11:03 AM   #2
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Let me check some schematics and I'll post. My guess its a ground issue.
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Old 08-09-2018, 11:13 AM   #3
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Thanks

Thank you I really appreciate it. I guess I thought that the brake lights, hazard lights, and turn signals used the same ground as the reverse lights. I hope that it is something simple.
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Old 08-09-2018, 12:27 PM   #4
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Ok, here's some information to work with.
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File Type: jpg 20180809_135513.jpg (79.9 KB, 1 views)
File Type: jpg 20180809_135032.jpg (96.1 KB, 2 views)
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2003 RCSB, 2wd, "Pro-Street"
6.4L/cog driven V7-Ysi/46rh trans/HTH Truckarm coilover suspension. HP Tuning...

1# 2017 HTC FASTEST HEMI List....
Current 1/4 mile [email protected] (2018)
Current 60' PB 1.351 (2019) mechanical issue for 1/4m

HTC 2018 TOTY

Support vehicle- 2007 QC G56 4x4 diesel
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Old 08-09-2018, 12:35 PM   #5
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My truck is an automatic so would it be the same process?
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Old 08-09-2018, 12:36 PM   #6
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And here are a couple drawings.
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File Type: jpg 20180809_142056.jpg (64.3 KB, 5 views)
File Type: jpg 20180809_140831.jpg (19.4 KB, 5 views)
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2003 RCSB, 2wd, "Pro-Street"
6.4L/cog driven V7-Ysi/46rh trans/HTH Truckarm coilover suspension. HP Tuning...

1# 2017 HTC FASTEST HEMI List....
Current 1/4 mile [email protected] (2018)
Current 60' PB 1.351 (2019) mechanical issue for 1/4m

HTC 2018 TOTY

Support vehicle- 2007 QC G56 4x4 diesel
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Old 08-09-2018, 01:28 PM   #7
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Lightbulb

Guess every state is different in that respect too...never had anyone care about backup lights around here when going for inspections ?
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Old 08-09-2018, 01:48 PM   #8
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Well here in the Houston-Metro area they do a visual and emission inspection. So if I check the reverse wires (vt/blk and blk) at the taillight plug and there is no voltage when in reverse, then that means it may be the front control module? All the other taillight functions work normal, brake lights, turn signals, hazard lights, just neither reverse light on either side.
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Old 08-09-2018, 01:49 PM   #9
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Here in Virginia backup lights are required. Although they didn't check them last inspection. Red's are of course different, with a 12v ignition wired to the switch and the switch output connected directly to the backup lights with them grounded.
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2003 RCSB, 2wd, "Pro-Street"
6.4L/cog driven V7-Ysi/46rh trans/HTH Truckarm coilover suspension. HP Tuning...

1# 2017 HTC FASTEST HEMI List....
Current 1/4 mile [email protected] (2018)
Current 60' PB 1.351 (2019) mechanical issue for 1/4m

HTC 2018 TOTY

Support vehicle- 2007 QC G56 4x4 diesel
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Old 08-09-2018, 01:57 PM   #10
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Yours is a 2003 model did it come that way or you rewired them like that? My truck is a 2003 quad cab, hemi, auto.
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