• Welcome Visitor! Please take a few seconds and Register for our forum. Even if you don't want to post, you can still 'Like' and react to posts.

Embarrassingly Stupid Question


CJREX

Member
U.S. Military - Veteran
Joined
Aug 6, 2007
Messages
740
Reaction score
8
Points
18
Location
N. GA.
Vehicle Year
2019
Make / Model
Ford
Engine Type
2.3 EcoBoost
Engine Size
2.3
Transmission
Automatic
2WD / 4WD
4WD
Which side of the starter relay does the power distribution box attach to?

The side nearer the front of the truck or the rear?

And then am I correct in guessing that the heavy gauge wire to the starter goes on the opposite post?

I'm trying to complete my 4.0 swap and it's been so long since I messed with it I forgot. :idiot:

Thanks!
 
Last edited:


MAKG

New Member
Joined
Aug 7, 2007
Messages
4,634
Reaction score
19
Points
0
Location
California central coast
Vehicle Year
1991
Make / Model
Ford
Engine Size
4.0L
Transmission
Manual
The PD box connects to the post that has continuity to the battery. IF the starter doesn't have its own relay attached (some 4.0Ls do), the starter cable goes to the post that is NOT connected to the battery with the key in any position but "crank." If the starter does have its own relay, the starter cable goes to the same position as the PD box, and a light gauge wire goes to the starter-mounted relay from where the starter cable would have gone.
 

CJREX

Member
U.S. Military - Veteran
Joined
Aug 6, 2007
Messages
740
Reaction score
8
Points
18
Location
N. GA.
Vehicle Year
2019
Make / Model
Ford
Engine Type
2.3 EcoBoost
Engine Size
2.3
Transmission
Automatic
2WD / 4WD
4WD
I'm using a '91 Explorer harness and starter. The + battery harness connector has a heavy gauge and a light gauge wire in it.

The connector at the relay is shaped like a large "U".

So the starter has 12v applied on the heavy gauge wire all the time and the light gauge wire connects it to energize?

This sounds like I need the heavy wire on the post nearer the front and the light wire on the rear post.

And the PD box and Alt wires will be on the same post as the heavy wire.

Is this correct?

I just don't want to nuke it this close to the finish :scare:
 

Sponsored Ad


Sponsored Ad

Staff online

Member & Vendor Upgrades

For a small yearly donation, you can support this forum and receive a 'Supporting Member' banner, or become a 'Supporting Vendor' and promote your products here. Click the banner to find out how.

Truck of The Month


Kirby N.
March Truck of The Month

Recently Featured

Want to see your truck here? Share your photos and details in the forum.

Follow TRS On Instagram

TRS Events

25th Anniversary Sponsors

Check Out The TRS Store


Sponsored Ad


Sponsored Ad

Sponsored Ad


Amazon Deals

Top