Fusebox question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

woody96 · 01-19-2005, 11:56 AM

Can anyone tell me in the pix below, if there is supposed to be a fuse (and what amperage) in the spot that is marked aux-heat A/C? In the pix, there is no fuse in there and I have a 1984 (just bought) with A/C that the compressor is not kicking in.,....wondered if there is supposed to be a fuse in there and what size/amperage??

60-66 Nut · 01-19-2005, 02:04 PM

I think the AUX AC fuse is for suburbans and stuff with rear air. On my '83 the fuse at the top right is for the AC. If your blower works then the fuse should be OK, I think the same fuse works the AC comp. Try jumping the low pressure switch on the AC accumulator near the firewall, if the compressor comes on then it's either low on freon or the low pressure switch could be bad. Good luck.

60-66 Nut

woody96 · 01-19-2005, 02:19 PM

THX....

how do I go about jumping the accumulater and checking the low pressure fues (?) if there is one for taking care of low pressure freon? Can you send me to the right places to look on the firewall, etc.?? THX a lot

CLASSIC87' · 01-19-2005, 02:56 PM

Unplug the switch from the accumulator (aluminum silver cylinder by firewall on passenger side). With the vehicle running and the a/c turned to the on position; install a jumper wire in the switch end. If the compressor kicks on, ur freon is more likely low.

woody96 · 01-19-2005, 03:21 PM

I am sorry, but I am pretty Barney Rubble here (

; that's me when it comes to electrical stuff).....).....when you say a "jumper wire", what are you describing or meaning? I think I can find what you are describing, just a bit confused as to the jumper wire........please describe......THX again!!!

CLASSIC87' · 01-19-2005, 05:25 PM

Any piece of scrap wire (even bailing/tie wire), something just to make a connection between the 2 connections inside of the switch plug. In sense what you are doing you are going to be bypassing the accumulator and making a direct current back to the compressor.

woody96 · 01-19-2005, 05:29 PM

THX, where is this again...the switch is aside the silver cylinder (accumulator) on the firewall?

CLASSIC87' · 01-19-2005, 06:22 PM

Yes it's the cylinder where your freon is stored (follow the 2 a/c black lines that come off of your compressor). The accumulator actually sits above & behind of your wheel- well in front of your heater box (which is connected to your firewall). It's the cylinder that "sweats" when your a/c running. It's the plug/switch that has to do with the accumulator, a 2 wire plug.

woody96 · 01-19-2005, 06:32 PM

THX!!! I will sure check this out...I hope it is just low on freon......

ozrulzk5 · 01-19-2005, 10:51 PM

Dont try to take the switch out of the accumilator because it is full of freon and just a bad switch you are going to end up with a face full of oil and freon!!

60-66 Nut · 01-20-2005, 12:51 PM

Yes, good pointer for someone not acquainted with A/C systems. Occasionally the schrader valve in the fitting can stick(unless it was left out completely)and when you start to unscrew the switch the freon/oil mixture, if there is any left, can spray everywhere. Then lights, bells, sirens, whistles, horns and other assorted noisy things will go off, and the freon police will come haul you away and lock you up, never to be seen or heard from again, and all of your children will be born naked!!!!!!! Or at least that's what I'm told.

LOL

60-66 Nut

01-19-2005, 11:56 AM	#1
woody96 Registered User Join Date: Jan 2005 Location: Chapin, SC Posts: 392	Fusebox question Can anyone tell me in the pix below, if there is supposed to be a fuse (and what amperage) in the spot that is marked aux-heat A/C? In the pix, there is no fuse in there and I have a 1984 (just bought) with A/C that the compressor is not kicking in.,....wondered if there is supposed to be a fuse in there and what size/amperage??

01-19-2005, 02:04 PM	#2
60-66 Nut Professional Beer Tester Join Date: Aug 2004 Location: Louisiana Posts: 453	I think the AUX AC fuse is for suburbans and stuff with rear air. On my '83 the fuse at the top right is for the AC. If your blower works then the fuse should be OK, I think the same fuse works the AC comp. Try jumping the low pressure switch on the AC accumulator near the firewall, if the compressor comes on then it's either low on freon or the low pressure switch could be bad. Good luck. 60-66 Nut __________________ 60 Ford F100 Custom Cab 61 Apache Short Fleetside 64 C10 Short Stepside 65 C80 409 V8 5spd(X-Firetruck) 83 GMC 350 Olds Diesel 85 GMC Short Bed 86 GMC Short Bed 90 GMC R3500 Crew Cab 92 GMC 1500

01-19-2005, 02:19 PM	#3
woody96 Registered User Join Date: Jan 2005 Location: Chapin, SC Posts: 392	Jumpering a/c accumulator THX.... how do I go about jumping the accumulater and checking the low pressure fues (?) if there is one for taking care of low pressure freon? Can you send me to the right places to look on the firewall, etc.?? THX a lot

01-19-2005, 03:21 PM	#5
woody96 Registered User Join Date: Jan 2005 Location: Chapin, SC Posts: 392	Jumper wire...? I am sorry, but I am pretty Barney Rubble here ( ; that's me when it comes to electrical stuff).....).....when you say a "jumper wire", what are you describing or meaning? I think I can find what you are describing, just a bit confused as to the jumper wire........please describe......THX again!!!

01-19-2005, 10:51 PM	#10
ozrulzk5 What can I do next ???? Join Date: Jan 2005 Location: Birmingham, Alabama 35126 Posts: 59	dont!!! Dont try to take the switch out of the accumilator because it is full of freon and just a bad switch you are going to end up with a face full of oil and freon!!

01-19-2005, 02:56 PM	#4
CLASSIC87' OL BLUU Join Date: Mar 2004 Location: WICHITA, KS. Posts: 1,065	Unplug the switch from the accumulator (aluminum silver cylinder by firewall on passenger side). With the vehicle running and the a/c turned to the on position; install a jumper wire in the switch end. If the compressor kicks on, ur freon is more likely low.

01-19-2005, 05:25 PM	#6
CLASSIC87' OL BLUU Join Date: Mar 2004 Location: WICHITA, KS. Posts: 1,065	Any piece of scrap wire (even bailing/tie wire), something just to make a connection between the 2 connections inside of the switch plug. In sense what you are doing you are going to be bypassing the accumulator and making a direct current back to the compressor.

01-19-2005, 05:29 PM	#7
woody96 Registered User Join Date: Jan 2005 Location: Chapin, SC Posts: 392	THX, where is this again...the switch is aside the silver cylinder (accumulator) on the firewall?

01-19-2005, 06:22 PM	#8
CLASSIC87' OL BLUU Join Date: Mar 2004 Location: WICHITA, KS. Posts: 1,065	Yes it's the cylinder where your freon is stored (follow the 2 a/c black lines that come off of your compressor). The accumulator actually sits above & behind of your wheel- well in front of your heater box (which is connected to your firewall). It's the cylinder that "sweats" when your a/c running. It's the plug/switch that has to do with the accumulator, a 2 wire plug.

01-19-2005, 06:32 PM	#9
woody96 Registered User Join Date: Jan 2005 Location: Chapin, SC Posts: 392	THX!!! I will sure check this out...I hope it is just low on freon......

01-20-2005, 12:51 PM	#11
60-66 Nut Professional Beer Tester Join Date: Aug 2004 Location: Louisiana Posts: 453	Yes, good pointer for someone not acquainted with A/C systems. Occasionally the schrader valve in the fitting can stick(unless it was left out completely)and when you start to unscrew the switch the freon/oil mixture, if there is any left, can spray everywhere. Then lights, bells, sirens, whistles, horns and other assorted noisy things will go off, and the freon police will come haul you away and lock you up, never to be seen or heard from again, and all of your children will be born naked!!!!!!! Or at least that's what I'm told. LOL 60-66 Nut __________________ 60 Ford F100 Custom Cab 61 Apache Short Fleetside 64 C10 Short Stepside 65 C80 409 V8 5spd(X-Firetruck) 83 GMC 350 Olds Diesel 85 GMC Short Bed 86 GMC Short Bed 90 GMC R3500 Crew Cab 92 GMC 1500



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