Another "What's this?" thread - The 1947 - Present Chevrolet & GMC Truck Message Board Network

baggedcten · 06-08-2010, 04:55 PM

whats is this?
Whats it for?
Where are the wires supposed to be going?

Thanks!

p.s. not my pic found it on this website so thanks for who ever took it

pcmcobra · 06-08-2010, 04:59 PM

It's a junction block, feeds power to cab and somewhere else, I forget, ran all new power under my hood, but I am still using that block.

bigd65 · 03-06-2011, 11:03 PM

This part ( The JUNCTION BOX) on my 82, the small pin has a wire that goes to the blower motor. The one that was on there was evidently burnt and ALL the wires were attached on the one pin. I got one off of a junk truck but no power goes through it from the larger pin(The POWER PIN) to the smaller pin ( The Blower Motor Power). The blower motor does not work now. Is this also a fused link for the the power to the blower motor.

I seen in one picture there is a fuseable link that splits from one wire to two. That is where I was getting very confused, That also feeds the power to the gauges so I think I may be ok on that part now.

NONE of the wire colors in all the diagrams I have found, match my 82 So this is really killing me. I am shopping wrecking yards to see if I can find and un-molested harness that will match mine

dropd80s · 03-07-2011, 10:16 AM

Ties all the main power feeds together. Power from the battery (starter terminal), alt., power to the fuse box to power the cab, and one wire to the passenger side to power the blower motor. They should all have fuseable links.

muddnutz · 03-07-2011, 10:58 AM

How about vacuum switch next to it. What's it for? Mine isn't connected
Posted via Mobile Device

jchav62 · 03-07-2011, 11:19 AM

Quote:

Originally Posted by muddnutz

How about vacuum switch next to it. What's it for? Mine isn't connected
Posted via Mobile Device

Looks like it may be the switch for the lock up converter... ?? I could be wrong. Someone's bound to know for sure...

Toxic Redline · 03-07-2011, 01:09 PM

All i know is if you drop your alternator while the hot is still hooked up and the battery still attached

(changing the alternator in harmons parking lot) it will melt that fusable link that is below it

dropd80s · 03-09-2011, 10:58 AM

Quote:

Originally Posted by muddnutz

How about vacuum switch next to it. What's it for? Mine isn't connected
Posted via Mobile Device

Quote:

Originally Posted by jchav62

Looks like it may be the switch for the lock up converter... ?? I could be wrong. Someone's bound to know for sure...

Yes its for the converter lock up.

muddnutz · 03-09-2011, 11:29 AM

Thanks
Posted via Mobile Device

lo72 · 03-09-2011, 12:01 PM

Could someone tell me where the vacuum hose goes from the lockup converter switch? PO removed the hose from the switch and i can't find a diagram to know where to reattach to provide vacuum to the switch

muddnutz · 03-09-2011, 01:53 PM

I hooked mine back to manifold vacuum port
Posted via Mobile Device

lo72 · 03-09-2011, 03:46 PM

and it shifts ok? My truck has a 350 turbo now but it came with a 700r4...All of the plugs are there. I wonder how much trouble it would be to put it back?

06-08-2010, 04:55 PM	#1
baggedcten 86 C10 Join Date: Sep 2007 Location: Ga. Posts: 416	Another "What's this?" thread whats is this? Whats it for? Where are the wires supposed to be going? Thanks! p.s. not my pic found it on this website so thanks for who ever took it Attached Images __________________ 1986 C10 2001 chevy silverado purchased 8-29-09 sold 2004 silverado purchased 8-27-10 sold

06-08-2010, 04:59 PM	#2
pcmcobra Registered User Join Date: Aug 2006 Location: Florida Posts: 1,684	Re: Another "What's this?" thread It's a junction block, feeds power to cab and somewhere else, I forget, ran all new power under my hood, but I am still using that block. __________________ 1986 C10 SWB 6.0/6l90e Miami...Flee it like a native

03-06-2011, 11:03 PM	#3
bigd65 Registered User Join Date: Mar 2000 Location: Clute, TX. Posts: 1,938	Re: Another "What's this?" thread This part ( The JUNCTION BOX) on my 82, the small pin has a wire that goes to the blower motor. The one that was on there was evidently burnt and ALL the wires were attached on the one pin. I got one off of a junk truck but no power goes through it from the larger pin(The POWER PIN) to the smaller pin ( The Blower Motor Power). The blower motor does not work now. Is this also a fused link for the the power to the blower motor. I seen in one picture there is a fuseable link that splits from one wire to two. That is where I was getting very confused, That also feeds the power to the gauges so I think I may be ok on that part now. NONE of the wire colors in all the diagrams I have found, match my 82 So this is really killing me. I am shopping wrecking yards to see if I can find and un-molested harness that will match mine __________________ 2004 Silverado Crewcab 1972 Chevy Monte Carlo 2017 Chevy Tahoe

03-07-2011, 10:16 AM	#4
dropd80s Registered User Join Date: Mar 2003 Location: wichita falls tx Posts: 429	Re: Another "What's this?" thread Ties all the main power feeds together. Power from the battery (starter terminal), alt., power to the fuse box to power the cab, and one wire to the passenger side to power the blower motor. They should all have fuseable links.

03-07-2011, 10:58 AM	#5
muddnutz Registered User Join Date: Mar 2011 Location: Canton/Holly Springs Ga Posts: 89	Re: Another "What's this?" thread How about vacuum switch next to it. What's it for? Mine isn't connected Posted via Mobile Device

03-07-2011, 01:09 PM	#7
Toxic Redline Registered User Join Date: May 2010 Location: Ogden, Utah Posts: 219	Re: Another "What's this?" thread All i know is if you drop your alternator while the hot is still hooked up and the battery still attached (changing the alternator in harmons parking lot) it will melt that fusable link that is below it __________________ 84 K20 Long Box W.I.P 78 Burb - parts now [Rolled] 68 c20 dump bed WHEN IN DOUBT--- FLOOR IT

03-09-2011, 11:29 AM	#9
muddnutz Registered User Join Date: Mar 2011 Location: Canton/Holly Springs Ga Posts: 89	Re: Another "What's this?" thread Thanks Posted via Mobile Device

03-09-2011, 12:01 PM	#10
lo72 Truck Junkie Join Date: Aug 2008 Location: Lithia Springs Ga Posts: 354	Re: Another "What's this?" thread Could someone tell me where the vacuum hose goes from the lockup converter switch? PO removed the hose from the switch and i can't find a diagram to know where to reattach to provide vacuum to the switch

03-09-2011, 01:53 PM	#11
muddnutz Registered User Join Date: Mar 2011 Location: Canton/Holly Springs Ga Posts: 89	Re: Another "What's this?" thread I hooked mine back to manifold vacuum port Posted via Mobile Device

03-09-2011, 03:46 PM	#12
lo72 Truck Junkie Join Date: Aug 2008 Location: Lithia Springs Ga Posts: 354	Re: Another "What's this?" thread and it shifts ok? My truck has a 350 turbo now but it came with a 700r4...All of the plugs are there. I wonder how much trouble it would be to put it back?



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