I have a 1990 Ford Bronco full-size XLT, and the passenger side power door lock is malfunctioning. I’ve checked the wiring, and there seems to be power at all the terminals. Is it correct to expect two constant power sources and two outputs when the switch is activated in either direction? Also, I noticed a black and orange stripe wire that seems to be connected to multiple sensors, could this be correct?
It sounds like you might have an issue with the wiring, possibly in the door jam area where the wires can get damaged. If there’s continuity but no voltage, that could indicate a melted wire or short. Have you checked for any melted wires?
@MaryJane
I haven’t checked for melted wires yet, but I will. I was wondering if the power and ground wires might be shorting somewhere.
You should only have one power wire and one ground wire at the switch. If they’re making contact somewhere, it could cause the fuse to stay intact while still causing issues with the system. Make sure to trace the wires carefully.
@Dakotah
I suspected something like that. I’ll trace the wires and check for any shorts. Thanks for confirming!
If both sides of the circuit are connected to the same fuse, the fact that the driver’s side works but the passenger side doesn’t suggests a wiring issue or a faulty switch on the passenger side.
David said:
If both sides of the circuit are connected to the same fuse, the fact that the driver’s side works but the passenger side doesn’t suggests a wiring issue or a faulty switch on the passenger side.
That makes sense! Since the driver’s side works, it seems like the fuse is fine, but I’ll check the passenger side wiring more closely.
The switch works by directing power to the ground, completing the circuit for either lock or unlock. If the ground is compromised, it could cause the malfunction you’re seeing.
Kaia said:
The switch works by directing power to the ground, completing the circuit for either lock or unlock. If the ground is compromised, it could cause the malfunction you’re seeing.
Ah, that clears things up! I was unsure about the switch operation. Thanks for the help!
If you’re seeing power at all the wires, it’s likely an issue with the ground or the way the wires are connected. Make sure to check the door jam area where the wires may be pinched or shorted out.
Derrick said:
If you’re seeing power at all the wires, it’s likely an issue with the ground or the way the wires are connected. Make sure to check the door jam area where the wires may be pinched or shorted out.
I’ll take a closer look at the door jam wiring and see if any wires have melted or been pinched. Thanks for the tip!