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99 F150, 4.6 V8 2WD. Transmission developed issues today, delayed shifting into 2nd, overdrive turned off by itself. I checked fluid, it was clean and full. Then noticed chewed off ground wire from intake manifold to firewall. Then noticed several chewed wires on main harness. I think and hope this could cause shifting issues, maybe causing transmission module trouble? I know I have to repair the cut wires. Two wires are very short at the main connector. Where can I get pins and how hard is it to remove pins so I can repair the wires? Taking off work to fix this Wednesday, could really use some answers. Thanks in advance
. My issue is the rodent cut the wire very close to the PCM connector on main harness, so there is not enough wire showing to splice. This means the main connector has to be removed from firewall to de-pin the short wires. Unscrew the PCM connector, then pry off the red plastic plate on back of plug. Each female pin can then be removed by inserting a small flat screwdriver into the hole by the pin, then pulling the pin. The wire can now be spliced. If needed I imagine Ford might sell the pins so that new ones can be crimped on.
With that many wires, I don't think I'd try to repair it. I'd replace the entire harness. You could wrap wire screen around the new one too, before you installed it, to protect it from further rodent damage.
I was able to repair it by de-pinning 3 wires and soldering extension wires on. Heat shrink after repairs and it runs great. Also took JackandJanet's advice, covering the repaired area with wire mesh, plus bought the ultrasonic rodent repellers from Amazon.
Excellent work! The repair looks very professional. I have to park my vehicles in my garage with the hoods up and flashing LEDs on inside the engine compartments to discourage the little buggers. I've also recently found a rodentcide called Mouse-X that is just pellets that contain salt as the active ingredient. Eating it evidentially causes them to become dehydrated and they die. It only effects rodents.
