Firewall mounted terminals

[Frosty02]

Hey Guys, I purchased a 1980 K10 and I am starting to go through the electrical, can anybody tell me what this connection on the firewall is for?

 

[legopnuematic]

Junction block.

 

[Frosty02]

Junction block.

Its just a junction that it? I don’t see the point in a termination that could fail when you could just run the wire straight through. Thanks for the info @legopnuematic

 

[DoubleDingo]

Its just a junction that it? I don’t see the point in a termination that could fail when you could just run the wire straight through. Thanks for the info @legopnuematic

The GM engineers did it for a reason. Don't mess with it.

 

[nvrenuf]

It is a distribution block. Constant power is fed to it from the fuse block (via harness junction block plug on the firewall below the wiper motor) and then, typically, it may feed the starter, alternator, etc depending on the year model, options, etc.

Some of the outgoing wiring would have had a fusible link, it's not uncommon for people to not know about these and bypass the block in an attempt to fix a lost power problem.

 

[Frosty02]

The GM engineers did it for a reason. Don't mess with it.

That’s my issue, it looks like it’s already messed with since both wires are coming off the same side of the terminal block.

 

[Frosty02]

It is a distribution block. Constant power is fed to it from the fuse block (via harness junction block plug on the firewall below the wiper motor) and then, typically, it may feed the starter, alternator, etc depending on the year model, options, etc.

Some of the outgoing wiring would have had a fusible link, it's not uncommon for people to not know about these and bypass the block in an attempt to fix a lost power problem.

It is a distribution block. Constant power is fed to it from the fuse block (via harness junction block plug on the firewall below the wiper motor) and then, typically, it may feed the starter, alternator, etc depending on the year model, options, etc.

Some of the outgoing wiring would have had a fusible link, it's not uncommon for people to not know about these and bypass the block in an attempt to fix a lost power problem.

Thanks for the explanation, that helps a lot.

 

[75gmck25]

Main power (large gauge red cable) runs from the battery positive to the starter. The starter terminal then has a 10 gauge wire that runs from there up to that distribution block on the firewall. From there you have a power wire running over to the fuse panel, and on most trucks a wire with a fuse in it that runs across toward the drivers side to the high speed blower relay.