bain

This is a 84 22R. Facing the truck its a thicker gauged wire (hot) that comes out near the right headlight harness... I cant figure out what it hooks to..the 3 red wires are to the headlight.

Thanks

stepside trd

If it comes on with the key, it is probably tied to your ignition system. Probably coil wire, or ignitor. Can't think of anything else that would require a power source on that side of the truck, besides the alt., but that would need a thicker gauge wire.

abeD85flatbed

if it is a large wire om that side of the engine bay it should be the charge lead from the alternator

bain

I couldnt find a place on the alternator for it..

sebastianholmes

whats the end of it look like? the connector.

bain

sebastianholmes

the wire from the alternator. theres a little nut on the alternator. 10mm. it goes under that.

bain

Thank you! Whats the purpose of it? Trying to learn about these 22Rs Is this the wire that charges the battery?

toyotacharles

that is the main battery wire that the alternator sends power to the battery with, muye impotante, and if you short that to ground alot of smoke and then fire. avoid touching it to anything but where it goes with battery hooked up.

bain

so thats why my charging and brake light it on...yea I already touched it to a ground and saw fireworks... Thanks for the help..

toyotacharles

no prob, hope all is well after it is assembled

sebastianholmes

yep. those lights mean alternator issues. trust me, ive replaced 2 already... they dont like 20-30 mph muddy water baths

bain

ok, hooked wire to back of alternator.... new alternator..2nd new voltage regulator..fuses good... grounds seem good... charging at 17+ volts..rev engine and volts increase...whats the deal? how can i test how many volts the alt is actually putting out? Thanks again guys

bain

nevermind...going to upgrade to a 60 amp..

bain

60 amp upgrade semi-complete..battery is charging properly but my dash lights are still on.. I have a 88 alt and wiring harness for the alt..it has a small yellow, small red and heavier white wire.. My 84 harness has small red, small yellow, heavier white, and even heavier white wire..which of the two white wires do i hook the single white wire from the alternator to?