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BFL13's avatar
BFL13
Explorer II
Jan 19, 2020

Ford Starting /House Charging Question UPDATE Test

New test 20 Jan. ---------- The solenoid in the sig rig only closes the line between the engine battery/starter/alternator and the house batts when the engine is "on". What happens when you tur...
MrWizard's avatar
MrWizard
Moderator
Jan 19, 2020
Ford start relay has NOTHING TO DO WITH battery charging
Chassis or house
In your case, The charge relay is only wired to the "run" side of the ignition, and only active when the key is in the run position, it might even be tied to the fuel pump relay circuit and only active with engine running
On the start mode of the ignition it does not engage/activate
Or you would not have needed to use that long jumper cables

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