Electrical issues after cab swap. - Dodge Cummins Diesel Forum
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post #1 of 31 (permalink) Old 09-26-2019, 06:04 PM Thread Starter
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Electrical issues after cab swap.

So my DRL doesn't work (I live in canada) and now some of my gauge cluster lights don't work either, my truck is an 04 3500. The gauge lights for night driving do not work, turn signal lights don't work (yet my actual turn signals do work, I can indicate left or right and both the front and rears work, just not on the cluster) and my highbeam light indicator doesn't work. I used my original harness (nothing under the hood was unplugged except for the fuse box and the grounds were undone). The turn signal indicators and highbeam indicator did work yesterday but now not today. Anyone have any idea on wth is going on?

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post #2 of 31 (permalink) Old 09-27-2019, 07:48 AM
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Hopefully used your original cluster.
Could be wiring/cluster(EMIC) or computer bus issue
check good power/grounds to cluster?
run cluster test to narrow down?
Run cluster test by
(1) Begin the test with the ignition switch in the
Off position.
(2) Depress the odometer/trip odometer switch button.
(3) While still holding the odometer/trip odometer
switch button depressed, turn the ignition switch to
the On position, but do not start the engine.
(4) Release the odometer/trip odometer switch button.
(5) The instrument cluster will simultaneously
illuminate all of the operational segments in both
VFD units, perform a bulb check of each operational
LED indicator. The VFD segments and LED indicators
remain illuminated as each gauge needle is
swept to several calibration points and back. If a
VFD segment or an LED indicator fails to illuminate,
or if a gauge needle fails to sweep through the calibration
points and back during this test, the instrument
cluster must be replaced. Following these tests,
the actuator test will proceed as described in Step 6.
(6) The text “C Code” is displayed in the odometer
VFD for about three seconds. If there is no stored
fault information, the display will show two pairs of
zeroes in the format “00” “00”, which indicate that
the display of fault information is done.
Post or search for codes
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post #3 of 31 (permalink) Old 09-27-2019, 09:27 AM Thread Starter
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I did do that yesterday, I got a bunch of codes and my lights that didn't work didn't light up. Now I have to find a cluster. Thank you, I appreciate it.
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post #4 of 31 (permalink) Old 09-27-2019, 09:33 AM Thread Starter
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Also, I did keep my original cluster, I heard they were vin locked.
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post #5 of 31 (permalink) Old 10-13-2019, 11:39 PM Thread Starter
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Turns out it's not my cluster, I swapped the spare cluster I had in and the issue was still there. I know this has been awhile but the truck is at a shop and I tried to narrow the issue down with no luck. A few days after this post my locks started to continuously lock by themselves, I think my abs light, air bag light and brake light are also apart of the problem (they were on before but I thought they were a separate issue) I did clean the grounds and positive wire locations, with no luck. 1 weird thing I found was the pink/dark green wire, pin 25, on the gray 26 pin connector, that is the 12v key on wire for the cluster, has 64 ohms of resistance to ground. When the key is on the locks don't act up, but after the truck sits for about 10 or more minutes the two 31 ohm resistors on the back of the cluster get hot, after they reach a certain temp is when the locks act up if those resisters stay cool the locks won't act up
Quote:
Originally Posted by rghavana View Post
Hopefully used your original cluster.
Could be wiring/cluster(EMIC) or computer bus issue
check good power/grounds to cluster?
run cluster test to narrow down?
Run cluster test by
(1) Begin the test with the ignition switch in the
Off position.
(2) Depress the odometer/trip odometer switch button.
(3) While still holding the odometer/trip odometer
switch button depressed, turn the ignition switch to
the On position, but do not start the engine.
(4) Release the odometer/trip odometer switch button.
(5) The instrument cluster will simultaneously
illuminate all of the operational segments in both
VFD units, perform a bulb check of each operational
LED indicator. The VFD segments and LED indicators
remain illuminated as each gauge needle is
swept to several calibration points and back. If a
VFD segment or an LED indicator fails to illuminate,
or if a gauge needle fails to sweep through the calibration
points and back during this test, the instrument
cluster must be replaced. Following these tests,
the actuator test will proceed as described in Step 6.
(6) The text “C Code” is displayed in the odometer
VFD for about three seconds. If there is no stored
fault information, the display will show two pairs of
zeroes in the format “00” “00”, which indicate that
the display of fault information is done.
Post or search for codes
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post #6 of 31 (permalink) Old 10-14-2019, 12:26 AM
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OP, do you show any codes?
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post #7 of 31 (permalink) Old 10-14-2019, 08:35 AM
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Ditto, What codes ?? that will help narrow down issue.
F21 circuit runs thru out truck
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post #8 of 31 (permalink) Old 10-14-2019, 01:47 PM Thread Starter
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These are the codes the cluster gave me with the cluster check 0d 21, 23, 25, 26, 3d, 41, 61, 62, 64, 81, A3, A4, Ad, Ae, B6, B7, B8, I also have a few other codes from the power train too 0595
0533
0483
0234
0572
1652 the AC and cruise control have been removed and pretty sure the over boost is because I ran the truck without the MAF. There's no check engine light.
Quote:
Originally Posted by Broncowilly View Post
OP, do you show any codes?
Quote:
Originally Posted by rghavana View Post
Ditto, What codes ?? that will help narrow down issue.
F21 circuit runs thru out truck
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post #9 of 31 (permalink) Old 10-14-2019, 07:04 PM
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All those codes usually point to power issue.
I would start with check wiring/power to cluster including grounds.
A3 Battery voltage open.
Possible Causes
IOD FUSE NOT INSTALLED
IOD FUSE OPEN
(A944) BATTERY VOLTAGE FEED OPEN
INSTRUMENT CLUSTER

A4 Ignition Run/Start circuit rationality.
Possible Causes
IGNITION RUN-START FUSE OPEN
(F21) IGNITION RUN-START CIRCUIT OPEN
INSTRUMENT CLUSTER
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post #10 of 31 (permalink) Old 10-15-2019, 12:14 PM Thread Starter
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I'll pass this info onto the shop as I sadly don't have the truck with me, I do appreciate the help.
Quote:
Originally Posted by rghavana View Post
All those codes usually point to power issue.
I would start with check wiring/power to cluster including grounds.
A3 Battery voltage open.
Possible Causes
IOD FUSE NOT INSTALLED
IOD FUSE OPEN
(A944) BATTERY VOLTAGE FEED OPEN
INSTRUMENT CLUSTER

A4 Ignition Run/Start circuit rationality.
Possible Causes
IGNITION RUN-START FUSE OPEN
(F21) IGNITION RUN-START CIRCUIT OPEN
INSTRUMENT CLUSTER
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post #11 of 31 (permalink) Old 10-15-2019, 01:54 PM Thread Starter
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By chance could it be a bad ECM?
Quote:
Originally Posted by rghavana View Post
All those codes usually point to power issue.
I would start with check wiring/power to cluster including grounds.
A3 Battery voltage open.
Possible Causes
IOD FUSE NOT INSTALLED
IOD FUSE OPEN
(A944) BATTERY VOLTAGE FEED OPEN
INSTRUMENT CLUSTER

A4 Ignition Run/Start circuit rationality.
Possible Causes
IGNITION RUN-START FUSE OPEN
(F21) IGNITION RUN-START CIRCUIT OPEN
INSTRUMENT CLUSTER
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post #12 of 31 (permalink) Old 10-15-2019, 07:09 PM
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If truck runs okay i dont think so
but would check out why
P1652-J1850 SHORT TO GROUND

P1652-J1850 SHORT TO GROUND (CONTINUED)
For the Engine circuit diagram (Refer to 9 - ENGINE - SCHEMATICS AND DIAGRAMS)
For a complete wiring diagram Refer to Section 8W.
When Monitored:
While the ignition is on.
Set Condition:
The ECM detects a short to ground on the J1850.
Possible Causes
ECM
(D25) J1850 SHORTED
COMMUNICATION
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING)
Diagnostic Test
1. ECM
Turn the ignition off.
Disconnect the ECM harness connectors.
NOTE: Check connectors - Clean/repair as necessary.
Measure the resistance between the (D25) J1850 circuit in the ECM
harness connector and battery negative.
Is the resistance less than 10 Ohms?
Yes >> Go To 2
No >> Replace the ECM.
Perform POWERTRAIN VERIFICATION TEST VER - 1
(DIESEL). (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES/ENGINE CONTROL MODULE - DIAGNOSIS
AND TESTING)

2. (D25) J1850 SHORTED
Measure the resistance between the (D25) J1850 circuit and all other
circuits in both ECM connectors.
Is the resistance greater than 100k ohms?
Yes >> Refer to the Body Diagnostic book Communications section.
No >> Repair (D25) J1850 shorted to another circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 1
(DIESEL). (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL
MODULES/ENGINE CONTROL MODULE - DIAGNOSIS
AND TESTING)
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