I need some electrical help
Today I was trying to get my dads heater switch working on his 70' (it has never worked on it's own). It has a toggle switch rigged up to the "ignition unfused" on the fuse panel. I tried 3 different heater controls and none work.  . When I hook up my test light, at the heater fuse it lights up, but when I test all 4 terminals on the plug it won't light up. Where should I look for the problem?. Thanks
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Jim
1970 C/10 Fleetside w/Ghost Flames
Lowered 4.5" front and 4" rear (Raked)
355/350 Turbo w/shift kit
10" Redneck Performance Verter w/2500 stall
Hooker Super Comps part#2808-1
Performer RPM Air-Gap
12 Bolt w/3:73 gears- Eaton Posi
Comp Cams XE262 with 1.6 Crane Energizers, Road Demon 625 and Brodix IK 180 heads
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