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Discussion Starter · #1 ·
First post here. I have a stock 2004 crew cab 4x4 with an automatic. Last night my drivers side low beam went out. Lamp Out light came on also. High beam still works. Replaced the bulb today with a new one and the low beam still does not work. Swapped bulbs from pass./ drivers side. Still no low beam on drivers side, but passenger side works fine.

Any ideas? Thanks for any help guys.
 

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Sounds like it could very well be your socket for the bulb. See if there is any crap in there. If so clean it up and try again. If not, probably time to replace it. Try putting a voltmeter to the socket and see if it getting any power to it. Check the wires as well for any pinches, breaks.
 

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Discussion Starter · #3 ·
I put a test light to the socket but didn't get anything at any of the three pins. I'm sure one of them is a ground though. I'll probably try replacing the socket especially if the headlights are as bad as the tail light sockets.
 

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It might be in your TIPM. What year truck do you have?
 

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Gear Nerd
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Check the fuse? :)
 

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Gear Nerd
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usually, yes... don't know for sure on your truck... but most cars have separate fuses so if a fuse blows you only lose one headlight instead of both...
 

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Blowin' smoke !!
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Lube it !!

You will probably have to do some troubleshooting as it sounds like you have already done. I have a grass roots rule that anything that comes apart electicly it goes back together with dielectric grease. cheap stuff!! I keep a tube in the glove box. I dont change a bulb without it. its like puttin' grease on your mechanics. Preventative maintenance Good luck!!
 
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Discussion Starter · #12 ·
I found this on another Dodge forum website. It explains how to diagnose the low headlight beam outage I am having. I haven't tried it yet but thought it might help someone else out also.



You can go to a dealership and pay $100 to have it diag first or put a FCM in and fix your problem. Check continuity to headlight connector and C7 Pin 6. If good most likely FCM.




Symptom:
FCM-LEFT LOWBEAM OUTPUT CIRCUIT OPEN
POSSIBLE CAUSES
INTERMITTENT CONDITION
LEFT LOWBEAM OUTPUT CIRCUIT OPEN
FRONT CONTROL MODULE
POWER DISTRIBUTION CENTER
TEST ACTION APPLICABILITY
1 Turn the ignition on.
With the DRBIIIt, clear all FCM DTC’s.
Turn the Lowbeam Lamps on.
With the DRBIIIt, read the DTC information.
Does the DRBIIIt read: Left Lowbeam Output Circuit Open?
All
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 BODY VERIFICATION TEST - VER 1.
2 Turn the ignition off.
Disconnect the IPM C7 harness connector
Measure the resistance of the Left Lowbeam Output circuit.
Is the resistance above 5.0 ohms?
All
Yes ! Repair the Left Lowbeam Output circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
No ! Go To 3
3 Turn the ignition off
Disconnect the FCM from the IPM.
Disconnect the IPM C7 harness connector.
Measure the resistance of the Left Lowbeam Output circuit.
Is the resistance above 5.0 ohms?
All
Yes ! Replace the Power Distribution Center..
Perform BODY VERIFICATION TEST - VER 1.
No ! Replace the Front Control Module.
Perform BODY VERIFICATION TEST - VER 1.
280
EXTERIOR LIGHTING


INTEGRATED POWER MODULE C7 - GRAY 26 WAY CAV CIRCUIT FUNCTION
1 T40 14BR STARTER MOTOR RELAY OUTPUT
2 V3 16BR/WT WIPER RELAY LOW SPEED OUTPUT
3 Y105 20BR/RD FUSED IGNITION SWITCH OUTPUT (RUN-ACC)
4 F235 18RD FUSED B(+)
5 - -
6 Y171 18WT/DG LEFT LOW BEAM DRIVER
7 Y168 18WT/LB RIGHT HIGH BEAM DRIVER
8 - -
9 A64 16DG/WT FUSED B(+)
10 - -
11 K51 20DB/YL AUTO SHUT DOWN RELAY CONTROL
12 K127 18DB/OR (CALIFORNIA) OXYGEN SENSOR DOWNSTREAM RELAY CONTROL
13 - -
14 - -
15 Y170 18WT/LG LEFT HIGH BEAM DRIVER
16 Y153 18DB/RD ADJUSTABLE PEDAL RELAY OUTPUT
17 C15 16DB/WT
18 - -
19 K31 20BR -
20 L39 18LB (FOG LAMPS) FOG LAMP RELAY OUTPUT
21 A41 16YL FUSED IGNITION SWITCH OUTPUT (START)
22 Y169 18WT/TN RIGHT LOW BEAM DRIVER
23 T24 20BR/YL (EXCEPT NGC) PARK/NEUTRAL POSITION SWITCH SENSE (T41)
23 T752 18DG/OR (NGC)
24 E1 20TN FUSED B(+)
25 A141 18DG/WT (EXCEPT NGC) FUSED AUTO SHUT DOWN RELAY OUTPUT
26 - -



HEADLAMP-LEFT - BLUE 3 WAY CAV CIRCUIT FUNCTION
1 Y171 18WT/DG LEFT LOW BEAM OUTPUT
2 Z141 18BK/LB GROUND
3 Y170 18WT/LG LEFT HIGH BEAM OUTPUT
 

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Where would I find this c7 connector? underneath of the fuse panel. im going to remove my flares, inner wheel wells and check my resistance and try to clean all of the connectors to see if it'll work then.
 

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MOLON LABE
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2,599 Posts
I'm just going to run a jumper wire from the left low beam and worry about the pdm when more stuff screws up.
lovin that logic!

did that on my neighbors car once. couldnt get the one side to light. jumped it to other side and burnt them both out. there was short in the system.

make sure you dont have a short before jumpin! lol
 

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Nope there was no shorts. The only weird thing is they don't come on right away if I flash high beams and go back to the lows they both work fine. Dumb lamp out light is on, but I can look past it. I won't get pulled over for the light on my dash and it was free not a $500 pdm.
 
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