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EFV-8 Club Forum / Light Commercial Truck Discussion / 40' Pickup Battery Connection

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Posted By Discussion Topic: 40' Pickup Battery Connection -- page: 1 2

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gcraigstep
09-15-2016 @ 8:44 AM
Member
Posts: 18
Joined: Sep 2016
          
I inherited my fathers 40' Pickup and was going through it and noticed the 6v battery connections were backwards from what I'm use to on all my 12v cars. The Negative was going to the solenoid and the positive was to ground. Could someone explain this to me. Pics included. Thanks

Had 3 pics but only one shows.

This message was edited by gcraigstep on 9-15-16 @ 8:48 AM

nelsb01
09-15-2016 @ 9:16 AM
Senior
Posts: 976
Joined: Oct 2009
          
Welcome to the world of 6 volt positive ground.
The cables are connected correctly. Don't know the exact reasoning for why it all started this way, but it does work and was in the standard operating procedure for many years.

Great looking truck by the way. If you are not a member, please consider joining. There is a lot of great members out there that can be of assistance in your learning about the truck.

This message was edited by nelsb01 on 9-15-16 @ 9:18 AM

TomO
09-17-2016 @ 8:11 AM
Senior
Posts: 7244
Joined: Oct 2009
          
Great looking truck.

You need to reply to your original post in order to post another photo. Each reply will let you post one photo.

Tom

This message was edited by TomO on 9-19-16 @ 9:00 AM

trjford8
09-17-2016 @ 11:47 AM
Senior
Posts: 4203
Joined: Oct 2009
          
You are one lucky person by inheriting that nice '40 pickup. The 40-41 pickups are probably the most popular pickup built by Ford. As other have said your battery cables are hooked up correctly.

41 Ford Pickup
10-29-2016 @ 9:13 PM
Member
Posts: 4
Joined: Oct 2016
          
I have been having battery and starting issues with my 1941 Ford 1/2 ton V8 pickup. It is new to me and stock 6V positive ground. I bought a new starter solenoid because the original is rusted. The new solenoid from Macs matches the old one and looks similar to the one you have pictured above.
The current solenoid is mounted with the auxillary starting switch to the top. The thumbnails above show the switch at the bottom. My shop manual shows it both ways. Up makes more sense to me. Up or down changes the driver and passenger sides and how you connect the cables.
As it came from the previous owner, the negative battery cable goes to the driver side of the solenoid and a ground strap also goes from the driver side solenoid to the engine.
What is right?

39 Ken
10-30-2016 @ 4:38 AM
Member
Posts: 380
Joined: Oct 2009
          
The button (aux. switch), when the solenoid is correctly mounted, is on the bottom. The battery cable from the negative post on the battery attaches to the inboard side along with the wires to the circuit breaker and ignition switch. The cable to the starter is attached to the outboard side of the solenoid.
Ken

This message was edited by 39 Ken on 10-30-16 @ 4:42 AM

TomO
10-30-2016 @ 10:09 AM
Senior
Posts: 7244
Joined: Oct 2009
          
There are a few different solenoids and they differ on internal wiring.

The Ford solenoid should be mounted with the button on the bottom and the NEG cable connected to the driver's side of the solenoid along with a thick yellow wire and NO ground strap. The internal wiring then powers the center terminal of the solenoid so that the starter button on the dash can provide a ground top pick the solenoid.

There should be a ground strap from the battery to the firewall and another from the firewall to the engine.

Save your rusty solenoid and clean the rust off with Evaporust, then give it a thin coat of aluminum paint. This will be a good spare, the newer ones do not last like the original ones.

Tom

41 Ford Pickup
10-30-2016 @ 6:10 PM
Member
Posts: 4
Joined: Oct 2016
          
I don't have the thick yellow wire that you mention.

I also don't have a ground strap from the battery to the firewall. Instead I have a battery cable that goes from the positive battery post to a bolt on the firewall. Then a ground strap connects to the same bolt on the firewall and the other end goes to the engine.

Should I replace the positive battery cable with a ground strap?

I will take your advice and save the old solenoid.

Thanks!


TomO
10-31-2016 @ 8:15 AM
Senior
Posts: 7244
Joined: Oct 2009
          
The thick (12gauge) yellow wire feeds voltage to the rest of the truck and should be in the wiring harness that come from inside the cab. The color may be gone.

The battery cable will work for the ground, but originally it was a woven strap. You can replace it if you want to.

Tom

41 Ford Pickup
10-31-2016 @ 5:53 PM
Member
Posts: 4
Joined: Oct 2016
          
I have a thin, black wire that is connected to the center terminal on the solenoid. It goes to the cab harness. No thick, yellow wire.

So it doesn't help to replace the positive battery cable with a ground wire?

Thanks Tom.



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