Need a key on hot lead in the engine compartment

[oldshoman]

If I can't resolve my cooling fan problem I want to instatt a Flex-I-Lite fan controller to turn the fan on and off. It needs a hot engine on lead. Where can I tap into one in the engine compartment?

 

[rubydist]

When I needed that, I used one of the wires on the wiper motor. I don't recall which, but one of them is hot w/ key in run. I found it by probing those wires.