Instrument cluster back with circuit board and connectors

The paper insulator prevents the hot side from shorting to the plate; the steel washer on the ground side helps it connect to the plate, but I also moved my dedicated ground wire to the voltmeter stud.

This diagram shows the new R wire going to the ig.sw., but it's effectively the same as what's shown above (C223).



See also:

. . . .

https://www.fleet.ford.com/truckbbas/non-html/1997/c37_39_p.pdf

Owner caption March 2012 · Photo 541 of 689