Larry2305
Member
- First Name
- Lawrence
- Joined
- Apr 28, 2024
- Threads
- 5
- Messages
- 14
- Reaction score
- 11
- Location
- Nova scotia
- Vehicle(s)
- 2019 ranger xlt supercab fx4
- Occupation
- Electrician
- Thread starter
- #1
I’m looking for help diagnosing an intermittent electrical issue with my 2019 Ranger.
The problem began after I returned the truck from a 91-octane tune to a 87-octane tune, but im notnsure this is the issue. It drove normally for approximately 300 km, then the ABS, traction-control, airbag and brake warning lights came on. I drove it home, shut it off, and afterward it would not crank with the key. I could hear one electronic click, but boosting the battery made no difference. The battery measured approximately 12.4 volts.
It's worth noting i drove through some of the worst rain I've seen in my 14 years of driving. Im suspecting this to be a water intrusion/bad ground/short.
Strangely, the truck would start using remote start. when I inserted and turned the key as it promts you too, i could then shift into drive and the truck would move but all lights stayed on the dash. I also received code P0630, although the VIN displayed by the scan tool matched the truck.
The modules/systems that were offline or showing faults included:
I took it into ford and the shop initially suspected the gateway module. They have not replaced anything yet, but after performing diagnostics and 800$ later and no parts replaced, the truck now starts normally with the key and the warning lights have disappeared. Maybe what it was dried out over the 3 days it was at the shop for? Im not sure but its my best guess
I have since discovered that both licence-plate bulbs failed around the same time. Both lamp sockets and wiring were wet, and the contacts appear to have shorted or overheated. The licence-plate lights use Yellow/Violet power wires and share rear ground point G401 with the BLIS modules.
Could water intrusion or a short in the licence-plate lamp circuit—or damage around G401 or the rear wiring harness—cause these modules to go offline and create the intermittent no-crank condition? I’m particularly interested in which connectors, grounds and BCM circuits I should test before replacing the gateway module.
I've also attached a list of all the codes the truck was throwing when all the modules were offline.
The problem began after I returned the truck from a 91-octane tune to a 87-octane tune, but im notnsure this is the issue. It drove normally for approximately 300 km, then the ABS, traction-control, airbag and brake warning lights came on. I drove it home, shut it off, and afterward it would not crank with the key. I could hear one electronic click, but boosting the battery made no difference. The battery measured approximately 12.4 volts.
It's worth noting i drove through some of the worst rain I've seen in my 14 years of driving. Im suspecting this to be a water intrusion/bad ground/short.
Strangely, the truck would start using remote start. when I inserted and turned the key as it promts you too, i could then shift into drive and the truck would move but all lights stayed on the dash. I also received code P0630, although the VIN displayed by the scan tool matched the truck.
The modules/systems that were offline or showing faults included:
- ABS
- Front and rear cameras
- Parking sensors
- Blind-spot monitoring/BLIS
I took it into ford and the shop initially suspected the gateway module. They have not replaced anything yet, but after performing diagnostics and 800$ later and no parts replaced, the truck now starts normally with the key and the warning lights have disappeared. Maybe what it was dried out over the 3 days it was at the shop for? Im not sure but its my best guess
I have since discovered that both licence-plate bulbs failed around the same time. Both lamp sockets and wiring were wet, and the contacts appear to have shorted or overheated. The licence-plate lights use Yellow/Violet power wires and share rear ground point G401 with the BLIS modules.
Could water intrusion or a short in the licence-plate lamp circuit—or damage around G401 or the rear wiring harness—cause these modules to go offline and create the intermittent no-crank condition? I’m particularly interested in which connectors, grounds and BCM circuits I should test before replacing the gateway module.
I've also attached a list of all the codes the truck was throwing when all the modules were offline.
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