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#1
10-12-2023, 10:12 AM
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AC Wire harness
Need some help. Pics would be great.
I think I am missing part of the AC harness. I have the part from fan to jumps into fire wall to switches. Is there another part ? Pics would be great to help. Not worried about ac at the moment, trying to get fan going. Thank you
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Send it! It’s going home on a trailer. |
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#2
10-12-2023, 12:23 PM
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Are you talking about the Blower Motor?
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Ed 1968 GTO (Thanks Mom) 2006 Silverado 2007 Cadillac SRX 2015 Chevy Express  
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#3
10-12-2023, 12:47 PM
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No power to blower motor. From reading I think I am missing the harness from the alternator.
This must supply the power ?
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Send it! It’s going home on a trailer. |
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#4
10-12-2023, 02:00 PM
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On AC cars the fan has two power sources, for top fan speed it comes direct from alternator with 30 amp inline fuse. the lower fan speeds get their power from the fuse block.
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My Break Away Squad 1969 Fbird (Base, 350 & Sprint Cvt’s - 400HO & TA Hardtops) 1969 LeMans (2dr & 4dr Hardtop and a Cvt) 1969 LeMans Safari 2 seat Wagon 1969 GTO (2 Cvt, 2 Hardtops & Judge Hardtop) 1969 Catalina (3 Cvt’s & a 2dr hardtop) 1969 Ventura 2 Seat Wagon 1969 Executive 4dr Sedan 1969 Bonnie Cvt 1969 Bonnie 3 Seat Wagon (2 of them) 1969 Bonnie Brougham (4dr Hardtop & Cvt) 1969 Grand Prix SJ (2 of them) 1969 2+2 2dr Hardtop (Canadian model) |
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#5
10-12-2023, 03:03 PM
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Except the 68.
68 A body blower speeds, Low, medium Low, medium High, and High receive power from the 30 amp fuse behind the alternator through the Master relay to the control head. Low speed for the blower is fed directly from the master relay instead of passing through the control head blower fan switch. The master relay is powered from the fuse box through the master switch on the control head. Another view of the 68 A/C Schematic courtesy of 68pongto Wiring for the 69 is a better design to prevent overheating of the Master Relay. The 68 wiring can be modified to the 69 design. Again, courtesy of 68pongto https://forums.maxperformanceinc.com...=68+ac+harness
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Ed 1968 GTO (Thanks Mom) 2006 Silverado 2007 Cadillac SRX 2015 Chevy Express
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#6
10-12-2023, 03:08 PM
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Quote:
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Ed 1968 GTO (Thanks Mom) 2006 Silverado 2007 Cadillac SRX 2015 Chevy Express
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#7
10-12-2023, 03:15 PM
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oops, wasn't aware that 68 was different! shoulda looked better at that schematic before opening my big mouth !
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My Break Away Squad 1969 Fbird (Base, 350 & Sprint Cvt’s - 400HO & TA Hardtops) 1969 LeMans (2dr & 4dr Hardtop and a Cvt) 1969 LeMans Safari 2 seat Wagon 1969 GTO (2 Cvt, 2 Hardtops & Judge Hardtop) 1969 Catalina (3 Cvt’s & a 2dr hardtop) 1969 Ventura 2 Seat Wagon 1969 Executive 4dr Sedan 1969 Bonnie Cvt 1969 Bonnie 3 Seat Wagon (2 of them) 1969 Bonnie Brougham (4dr Hardtop & Cvt) 1969 Grand Prix SJ (2 of them) 1969 2+2 2dr Hardtop (Canadian model) |
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#8
10-12-2023, 04:01 PM
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One of the few instances where the 69 is better than the 68
. 
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Ed 1968 GTO (Thanks Mom) 2006 Silverado 2007 Cadillac SRX 2015 Chevy Express
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#9
10-12-2023, 04:26 PM
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Hey!!!
��
__________________
My Break Away Squad 1969 Fbird (Base, 350 & Sprint Cvt’s - 400HO & TA Hardtops) 1969 LeMans (2dr & 4dr Hardtop and a Cvt) 1969 LeMans Safari 2 seat Wagon 1969 GTO (2 Cvt, 2 Hardtops & Judge Hardtop) 1969 Catalina (3 Cvt’s & a 2dr hardtop) 1969 Ventura 2 Seat Wagon 1969 Executive 4dr Sedan 1969 Bonnie Cvt 1969 Bonnie 3 Seat Wagon (2 of them) 1969 Bonnie Brougham (4dr Hardtop & Cvt) 1969 Grand Prix SJ (2 of them) 1969 2+2 2dr Hardtop (Canadian model) |
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#10
10-12-2023, 10:25 PM
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Should blower motor have power even without that front harness ? Right now has no power.
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Send it! It’s going home on a trailer. |
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