Anything I am missing here?
#1
10-29-2013, 09:28 AM
Anything I am missing here?
Owner Complaint:
1. Interior lights stay on
2. Battery drains over a couple days, blower /gauges / radio don't work.
Repairs
1. test door switches, passenger front switch bad,remove from service, related to fuse circuit 18.
2. Test all fuses, fuse 14 (5 amp) is open. Replacewith another 5 amp and fuse blows. Replaced with 10 amp fuse and fuse blows.Replace with 20 amp fuse and circuit is operational. Operate system for 10minutes, gauges / blower / radio all work. Replace 20 amp fuse with 10 ampfuse, circuit remains operational.
Blower likely has high current draw due an obstruction. Using a higher fuse allowed the blower motor to operate and clear the obstruction.
3. Test battery parasitic draw, check current drawfor entire vehicle.
Battery state of charge is 12.58 vdc.
Fuse circuit 14 has constantcurrent draw of 400mA (0.400 amps). Acceptable current draw should be less than50mA (0.050 amps). With fuse 14 removed, current draw is zero.
Fuse 14 feeds the Body Control Module (BCM). Essentially acomputer that controls the various aspects of the vehicle body's electricalcomponents, such as blower, gauges, radio, etc. Chrysler BCM units are prone tofailure.
Diagnosis is bad BCM causing excessive current draw.
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