Starts then dies 2003 express 3500
#11
Did you measure any current on it?
it could , but likelihood is low. Especially since everything else is working.
Do you have any aftermarket accessories? Anti-theft, remote start etc.
it could , but likelihood is low. Especially since everything else is working.
Do you have any aftermarket accessories? Anti-theft, remote start etc.
#12
At one time there was a gps tracker from Verizon on the van but that was removed a year or more ago, was thinking that might be it too but I can’t seem to find where it was sliced in
#13
got the rear tail light to work changed bulb and it works again bulb looked fine when compared to the new bulb.
Before I spend 200 on a bcm would like to know if that could be it.
Last edited by not6bucks; October 18th, 2021 at 4:45 PM.
#14
#15
#16
#18
That's thoroughly confusing because you said
Anyway, unplug all the BCM connectors and measure the resistance between these wires and ground. It should be at least 2 ohms:
Battery Positive Voltage, Ignition Voltage, 5V or 12V Reference, any supply voltage
BCM pinout: 2003 Express Body Control Module - Chevy & GMC Vans
Anyway, unplug all the BCM connectors and measure the resistance between these wires and ground. It should be at least 2 ohms:
Battery Positive Voltage, Ignition Voltage, 5V or 12V Reference, any supply voltage
BCM pinout: 2003 Express Body Control Module - Chevy & GMC Vans
#19
That's thoroughly confusing because you said
Anyway, unplug all the BCM connectors and measure the resistance between these wires and ground. It should be at least 2 ohms:
Battery Positive Voltage, Ignition Voltage, 5V or 12V Reference, any supply voltage
BCM pinout: 2003 Express Body Control Module - Chevy & GMC Vans
Anyway, unplug all the BCM connectors and measure the resistance between these wires and ground. It should be at least 2 ohms:
Battery Positive Voltage, Ignition Voltage, 5V or 12V Reference, any supply voltage
BCM pinout: 2003 Express Body Control Module - Chevy & GMC Vans
Plug C1= (A 2.5) (E 3.3)
Plug C2= (B3 74.2) (B6 0.3)
Plug C3= (B6 0.3)
Plug C4=( A4 47.5) (A5 0.5)
Plug C5 = (F0.8) (E 1.1)
#20
C5 looks suspicious. Try unplugging that.
I'm not sure why you measured grounds and signals. Like I said you need supply voltage pins.
C1 - C,D,F
C2 - A11,A12,B8,B11
C4 - A3,A4 etc...
Oh yah, and always disconnect the negative battery cable before poking around in the electricals.
I'm not sure why you measured grounds and signals. Like I said you need supply voltage pins.
C1 - C,D,F
C2 - A11,A12,B8,B11
C4 - A3,A4 etc...
Oh yah, and always disconnect the negative battery cable before poking around in the electricals.
Last edited by mountainmanjoe; October 20th, 2021 at 3:32 AM.