i recently had some electrical problems with my 86 f150 300in 6 i have replaced the battery all the wires and a sylinoid,my problem is i need to jump the truck every time to start it,once the truck is started the battery just looses its charge it goes from 13.5 to ab`out 11 then shuts off,and while its in the process of loosing volts all lights go dim. i tried to do a load test ont the truck by disconnectint the neg battery cable and reading if there were any volts. with it disconected i got a full 13 volt at the neg cable i found out when i disconnected the 2 black and red wires off the sylinoid the draw went to 0 they are they small wires not the power wires to starter black goes to altinator no clue where red goes i dont know if i need a new ignitioin switch or what please some electrical guru please help thanks

 

Tell us if this helps you:

https://www.ford-trucks.com/forums/1...t-need-it.html

 

this is a good guide but i already performed this test and found my altinator to be charging the battery fine my problem seems to be a drain some where in the wiring i narrowed it to some where at the sylinod. and does anybody know where i can find the location of the voltage regulator at

 

I'll probably regret asking this but how did you test charging system?

 

Voltage regulator on an 86....probably on the back of the alternator.

 

yes i have tried but everything checked out i believe my battery drain is commin from the ignition switch after 200 dollars thrown into the truck i dont want to continue trrowing money into this problem

 

I am not sure what the black & red wires you removed from the solenoid are used for; in fact, I'm not even sure they're factory.

Can you by chance post some close-up pictures of your starter solenoid, battery and alternator?

Do the wire you speak of show up here? One of subford's pictures:

 

i posted pics in my profile sorry its under truck i could not figure how to post a pic in the reply

 

I'd have the altenator tested. Sounds like one of the diodes is bad.