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86humv, Per your suggestion I checked the dash connector on the smart box. I have no power to socket A in any position , i.e. no voltage in the off, run , or start positions.

No it is the stock ignition switch. Wire 11A is hot with the batteries connected. 29A gets power when switched to run and 14A gets power when switched to start. Checked with a meter and verified by changing out switches.

I have a 1986 M998 that the starter solenoid burned out on. I replaced the solenoid and starter with a good used unit. When I hooked the batteries back up the starter engages and tries to start the engine. The problem is that wire ( 74A ) to the starter solenoid is hot all the time the...