Step by step instruction to replace the Heater Core for Ford F150 4.6 vehicle. 1. Tying off the antenna cable to a old shoelace was a great little trick that made the reassembly a snap, allowed pulling antenna cable back out of the hole real easy. I used elect tape too, didn’t want “ANY” surprises later! Leave all the steering column and large bulkhead elect plugs attached, I unhooked these before the Ford mechanic advised me not to mess with them. I removed the big elect housing located right over the heater core housing to aide in getting the cover reinstalled, it was in the way when I was reinstalling the plenum cover, 2 screws, no big deal. Release the push clip from the lower instrument panel steering column cover. Remove the two hood latch release handle screws. 2 Remove the hood latch release handle. Remove the instrument panel floor duct panel. • Remove two push clips and release one expander clip. Remove the six lower instrument panel steering column cover bolts. 2 Remove the lower instrument panel steering column cover. Disconnect the two air bag diagnostic monitor electrical connectors. (Steps 16-20, disconnect “all” plugs and ground wires on the RH Passenger floorboard, some may not be listed here) user tip: use masking tape to label matching ends of these plugs Disconnect the radio antenna lead in cable (18812) and the radio wiring connectors.
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