1988 Evinrude 40hp Trim/Tilt Not Operating

mystic headlock

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1988 Evinrude 40 Model E40TLCCS

As I was coming in from a trip yesterday, I found that my electric trim/tilt function is no longer working. At all. The outboard itself starts up just fine, everything else relying on power is good to go. I get absolutely no response from the switch, no clicking, nothing.

What I've tried so far is testing the wires at the four wire connector. The blue and green wires coming from the switch both test at 12 volts reliably. I've ensured the battery is fully charged and, indeed, no sign of trouble there. I also used a jumper from the wiring harness (coming from the tilt motor) to connect straight to the battery and can get a response from the tilt motor that way. I have not attempted to maintain that connection long enough to actually raise the tilt up but I did confirm that I get a response, at the very least.

So what's left? Seems to me (though I'm a rookie) that the switch tests OK, the battery tests OK, and the motor seems to be responsive when using the jumper. Does that leave only the wiring between the battery and the four wire connector? The fuse at the battery doesn't seem to be blown.

Most people seem to have a clicking noise when they have their trim/tilt go out. I do not.

I have loads more speculation but I'll try not to insert any more bias before I get a response. I would appreciate any help I can get, I'm a novice at this, my multi-meter skills are... primitive, but with a little patience I can get just about anything working. I think I'll need a little push here though.
 

mystic headlock

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If no one has any ideas on the above, can anyone give me some advice on where to find the relay? My current theory is it’s the relay. I’ve looked for the relay everywhere but apparently where the relay is.
 
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