89 Ford F-150 straight six Solenoid Switch

According to the wiring diagram:

Red is common with the Bat/Ammeter/Starter. Fusible link inline

Brn to starter

Yel to Ign Sw

Brn/Yel(2x) to Neutral start sw (if A trans) and to A/C system.

Hope this helps....

Dave S(Texas)

You'll need the schematic to see where each lead goes. What doesn't work when these two are left off?

Thanks after seeing more in the daylight and checking things it was a green wire that goes in to the altenator and also branches off to something else in to another wiring harness. Auto Zone tested my altenator and said it was ok and it is charging the system but whenever I connect the wire back to the solenoid the battery drops slowly. So a alternator can drain a battery even when not running? or could it be the voltage regulater? Thanks, Vince

You could have up to 4 bad diodes in the alternator and still show 1/3 output. And yes, shorted diodes will drain a battery. The next step would be to just take the large wire off the alternator and see if the drains goes away.

Well that answeres some Okay I don't see a large wire at all. I do see to plugs going in to the alternator one on the bottom and one on the side so I would unplug one of these? and then connect the green wire back to the solenoid switch? Thanks

Yes, one of the plugs should have a 10ga wire on it. That's the one you want to unplug. Or if unsure, just unplug both.