What are these plugs/wires for? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**gordyzx9r** · 08-12-2024, 08:57 AM

I can't seem to find these in the wiring diagram...

The one on the passenger side looks like it broke at the end to wherever it's supposed to go and when I pulled it apart it looked like it had a glass fuse that rusted and caused it to break. There is an identical plug/wire on the driver side.

1970 C10 but it's not original and had lots of DIY mods over the years before we got it and a mad scientist did all the "wiring".

**PbFut** · 08-12-2024, 09:17 AM

Battery meter

**gordyzx9r** · 08-12-2024, 09:21 AM

Quote:

Originally Posted by PbFut

Battery meter

This is going to the voltage gauge? Why the two plugs/fuses on both sides of the truck?

72c20customcamper · 08-12-2024, 09:30 AM

Quote:

Originally Posted by gordyzx9r

This is going to the voltage gauge? Why the two plugs/fuses on both sides of the truck?

Both are used for the amp meter . Takes the mini glass fuse

**67 twins** · 08-12-2024, 09:35 AM

Quote:

Originally Posted by gordyzx9r

This is going to the voltage gauge? Why the two plugs/fuses on both sides of the truck?

It's for an original Ammeter not Voltage meter. The Ammeter senses the difference in voltage on both ends of the circuit. If you're truck still has an Ammeter then you'll need both fuses. If your truck has been retrofitted with a Voltage meter then this circuit should no longer be hooked up or needed.

RichardJ · 08-12-2024, 10:18 AM

Both use a 4 Amp fuse for the Battery Gauge (Ammeter). They both go directly to the gauge and nowhere else.

Wrenchbender Ret · 08-12-2024, 10:37 AM

If it is corroded or you can't get the broken fuse out, you can replace it with a universal inline fuse holder & a 4 amp fuse.

George

**jaros44sr** · 08-12-2024, 10:43 AM

I’d soak it for a few days in WD-40, then grab the remaining metal with smallest needle nose pliers ya got in your toolbox, don’t destroy the rubber boot

**Rust_never_sleeps** · 08-12-2024, 12:30 PM

In case it's not blatantly obvious, these are the short type. P/n is SFE-4
I couldn't find them locally and had to order them off the River.
Near as I can tell, that janky looking plastic tape on the bundle is original

**gordyzx9r** · 08-12-2024, 04:55 PM

Thank you everyone, it does have the stock ammeter in it but never worked...now I know why.

But we do have an aftermarket set of gauges for oil press, voltage, and water temp so we're just going with that and deleting everything else...

Quote:

Originally Posted by RichardJ

Both use a 4 Amp fuse for the Battery Gauge (Ammeter). They both go directly to the gauge and nowhere else.

Thank you.

**HO455** · 08-13-2024, 12:32 AM

Quote:

Originally Posted by Rust_never_sleeps

In case it's not blatantly obvious, these are the short type. P/n is SFE-4
I couldn't fine them locally and had to order them off the River.
Near as I can tell, that janky looking plastic tape on the bundle is original

Inside that janky bundle of tape lies the main splice of the harness.

BRL · 08-14-2024, 07:29 AM

Quote:

Originally Posted by 67 twins

...If your truck has been retrofitted with a Voltage meter then this circuit should no longer be hooked up or needed.

I just wanted to take a second to let you people know how much I appreciate this forum.

I have both the plugs and fuses and I had no idea what they did so I left the wire connected forever even though I installed a voltmeter long ago.

Good job you guys!

08-12-2024, 08:57 AM	#1
gordyzx9r Junior Member Join Date: Jul 2005 Location: Alabama Posts: 87	What are these plugs/wires for? I can't seem to find these in the wiring diagram... The one on the passenger side looks like it broke at the end to wherever it's supposed to go and when I pulled it apart it looked like it had a glass fuse that rusted and caused it to break. There is an identical plug/wire on the driver side. 1970 C10 but it's not original and had lots of DIY mods over the years before we got it and a mad scientist did all the "wiring". Attached Images __________________ 1987 Buick Grand National

08-12-2024, 09:17 AM	#2
PbFut Senior Member Join Date: Feb 2022 Location: Ca Posts: 633	Re: What are these plugs/wires for? Battery meter

08-12-2024, 10:18 AM	#6
RichardJ Registered User Join Date: Apr 2010 Location: So Cal Posts: 1,470	Re: What are these plugs/wires for? Both use a 4 Amp fuse for the Battery Gauge (Ammeter). They both go directly to the gauge and nowhere else. Attached Images __________________ '67 GMC 2500, 292, 4spd, AC

08-12-2024, 10:37 AM	#7
Wrenchbender Ret Registered User Join Date: Oct 2005 Location: Overland Park, Ks. Posts: 5,229	Re: What are these plugs/wires for? If it is corroded or you can't get the broken fuse out, you can replace it with a universal inline fuse holder & a 4 amp fuse. George

08-12-2024, 10:43 AM	#8
jaros44sr Senior Member Join Date: May 2006 Location: Philadelphia, Pa. 19454 Posts: 9,766	Re: What are these plugs/wires for? I’d soak it for a few days in WD-40, then grab the remaining metal with smallest needle nose pliers ya got in your toolbox, don’t destroy the rubber boot __________________ Semper Fi...Uncle Sam, you da man All parts offered to help are free, unless otherwise noted Dont try this stuff in my build thread, unless you have 55 years of mechanical OTJ training SAFETY FIRST AS usual, off topic They say your mind goes second, can't remember the first Jim

08-12-2024, 12:30 PM	#9
Rust_never_sleeps Senior Member Join Date: Jun 2022 Location: San Ramon,CA Posts: 608	Re: What are these plugs/wires for? In case it's not blatantly obvious, these are the short type. P/n is SFE-4 I couldn't find them locally and had to order them off the River. Near as I can tell, that janky looking plastic tape on the bundle is original __________________ 1970 C10 Custom longbed 350/350 Code: __ ______\|__]\____ ....\|___(o)_____(o)_] Last edited by Rust_never_sleeps; 08-14-2024 at 12:57 PM.



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