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Electrical 3rd Gen Dodge Ram Electrical Problems and Questions.


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  #1  
Old 10-21-2013, 01:09 PM
yamaha021986 yamaha021986 is offline
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Exclamation 1 headlight not working

I had a KARR alarm system with the BLUE light and I took it off because it was just annoying and acting up. I also had halo projector headlights in my truck, one day only the driver side low beam stopped working and it turned out to be the light bulb blew. so instead of replacing the bulb i took the whole set up off and put my stock lights back on. Even then the lowbeam still did not work.... So i bought new bulbs thinking the bulbs were bad... still nothing, now my low beam on the passernger side still works and both high beams work too.. From what I've read it could eaither be a short in the light switch its self....or... thats all I've gotten anyone have any issues like this? Any and all help would be great tired of getting pulled over for having only 1 head light at night, apperently its not sufficent enough to drive with 1 headlight and to fog lights... no tickets yet....
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Old 10-21-2013, 10:41 PM
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Start with testing the switch. Download the Repair Manual from this forum (search for the link, I don't have it any more). There should be a flow chart in the manual for testing the switch.
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Old 10-21-2013, 10:46 PM
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From the manual:
Turn the ignition off.
Disconnect the TIPM C7 harness connector.
Disconnect the Left Headlamp harness connector.
Measure the resistance between ground and the (L33) Left High Beam
Driver circuit.
Is the resistance below 5.0 ohms?
Yes >> Repair the (L33) Left High Beam Driver circuit for a short to
ground condition.
Perform the BODY VERIFICATION TEST - VER 1. (Refer to
8 - ELECTRICAL/ELECTRONIC CONTROL MODULES -
STANDARD PROCEDURE)
No >> Replace the Totally Integrated Power Module (TIPM) in
accordance with the service information.
Perform the BODY VERIFICATION TEST - VER 1. (Refer to
8 - ELECTRICAL/ELECTRONIC CONTROL MODULES -
STANDARD PROCEDURE)
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Old 10-21-2013, 10:48 PM
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disregard the last, here is the low beam one...
Turn the ignition on.
With the Scan Tool, clear all TIPM DTC’s.
Turn the Headlamps on.
With the Scan Tool read the DTC information.
Does the Scan Tool read: B162B-LEFT LOW BEAM CONTROL CIRCUIT LOW?
Yes >> Go To 2
No >> The condition that caused the symptom is currently not present. Inspect the related wiring for a possible
intermittent condition. Look for any chafed, pierced, pinched, or partially broken wires.
Perform the BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES - STANDARD PROCEDURE)
2. (L43) LEFT LOW BEAM DRIVER CIRCUIT SHORT TO GROUND
Turn the ignition off.
Disconnect the TIPM C5 harness connector.
Disconnect the Left Headlamp harness connector.
Measure the resistance between ground and the (L43) Left Low Beam
Driver circuit.
Is the resistance below 5.0 ohms?
Yes >> Repair the (L43) Left Low Beam Driver circuit for a short to
ground condition.
Perform the BODY VERIFICATION TEST - VER 1. (Refer to
8 - ELECTRICAL/ELECTRONIC CONTROL MODULES -
STANDARD PROCEDURE)
No >> Replace the Front Totally Integrated Power Module (TIPM)
in accordance with the service information.
Perform the BODY VERIFICATION TEST - VER 1. (Refer to
8 - ELECTRICAL/ELECTRONIC CONTROL MODULES -
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Old 10-22-2013, 08:47 AM
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I dont think its a short, i think you have an open. Shorts USUALLY will trip a fuse or circuit breaker (depending on the system).

Do a quick test to determine which direction to take:
With the bulb plugged in, (bulb turned on) get a couple t-pins and back-probe the connector, use a multimeter on
DC Volts.

Red lead on positive power side and blk lead on body ground. if not voltage chase the voltage up the line to the BCM. if you have power, check ground side and most likely have bad ground connection or break in gound line.
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