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#1 |
1962 C-10
Join Date: Apr 2005
Location: Las Vegas, New Mexico
Posts: 4,978
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Vintage Air voltage drop
Hi all! Not too long ago i purchased a used vintage air setup from a fellow member. It's been installed for a while. I'm finally going to take it in for some r134 tomorrow.
![]() Thanks... and wish everyone all the best during these crazy times.. stay healthy JC62
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Joseph Chavez ![]() "See the USA in a Chevrolet!!" ......................_____ .........________//__{\_____ ,,,,,,,/__(O)___//___/__(O)_/ 1962 C10 Shortbed Fleetside 327/th350 GV overdrive 1974 C10 Longbed Fleetside 350/th350 "The Trash Truck" 1999 Chevy 2500 OBS, Longbed 5.7/4L80E 4x4 2015 GMC Sierra SLE 1500 4x4 |
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#2 |
It's Better With Nitro
Join Date: Apr 2008
Location: Chino Hills, CA
Posts: 2,261
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Re: Vintage Air voltage drop
What is the amp rating of your alternator? Intalling my Vintage Air AC system was one of the reasons I went with a 160 amp alternator.
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1963 C-10: Deluxe-optioned cab, shortbed, fleetside Pontiac 462 ci, Kauffman D-Port alum. heads 4L80E, narrowed sheetmetal Ford 9-inch Tubular front and rear suspension Custom 6-piston front disc and 4-piston rear disc brakes |
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#3 |
Registered User
Join Date: Mar 2014
Location: Tacoma Wa
Posts: 146
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Re: Vintage Air voltage drop
You have a large enough feed wire to your fan motor?
Feed wire size from battery to fuse panel?
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1953 3100 261cu in, sm420, 3.55 torque tube, omaha orange 1964 GMC 1000 series,custom, 305E, sm420 |
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#4 |
1962 C-10
Join Date: Apr 2005
Location: Las Vegas, New Mexico
Posts: 4,978
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Re: Vintage Air voltage drop
I put in a new under hood harness. Under the dash is still original wiring. Factory fan wiring.
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Joseph Chavez ![]() "See the USA in a Chevrolet!!" ......................_____ .........________//__{\_____ ,,,,,,,/__(O)___//___/__(O)_/ 1962 C10 Shortbed Fleetside 327/th350 GV overdrive 1974 C10 Longbed Fleetside 350/th350 "The Trash Truck" 1999 Chevy 2500 OBS, Longbed 5.7/4L80E 4x4 2015 GMC Sierra SLE 1500 4x4 |
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#5 |
Senior Member
![]() Join Date: Apr 2009
Location: SAN FERNANDO VALLE SOL CAL
Posts: 1,064
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Re: Vintage Air voltage drop
Ac Compressor Pulling To Many Amps, You need A 160 Amp Alternator
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1966 GMC K25 V6 351E Original Utility Truck 2000 C3500 Hot Rod Utility Truck 2003 ROAD KING 100th 124ci 6 Speed 145CI M/P Pro Street FXR 2002 FXDP 2007 2500HD DURAMAX. DD Studio Teamsters / Mechanic Retired GM Master Tech 20 Years Retired Ford Tech 15 Years |
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#6 | |
1962 C-10
Join Date: Apr 2005
Location: Las Vegas, New Mexico
Posts: 4,978
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Re: Vintage Air voltage drop
Quote:
I'll upgrade the alternator. thanks! ![]()
__________________
Joseph Chavez ![]() "See the USA in a Chevrolet!!" ......................_____ .........________//__{\_____ ,,,,,,,/__(O)___//___/__(O)_/ 1962 C10 Shortbed Fleetside 327/th350 GV overdrive 1974 C10 Longbed Fleetside 350/th350 "The Trash Truck" 1999 Chevy 2500 OBS, Longbed 5.7/4L80E 4x4 2015 GMC Sierra SLE 1500 4x4 |
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#7 |
1962 C-10
Join Date: Apr 2005
Location: Las Vegas, New Mexico
Posts: 4,978
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Re: Vintage Air voltage drop
I'll have to double check. I upgraded but i don't remember the expat amperage.
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Joseph Chavez ![]() "See the USA in a Chevrolet!!" ......................_____ .........________//__{\_____ ,,,,,,,/__(O)___//___/__(O)_/ 1962 C10 Shortbed Fleetside 327/th350 GV overdrive 1974 C10 Longbed Fleetside 350/th350 "The Trash Truck" 1999 Chevy 2500 OBS, Longbed 5.7/4L80E 4x4 2015 GMC Sierra SLE 1500 4x4 |
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#8 |
Moderator
![]() ![]() Join Date: Aug 2011
Location: China Spring, TX
Posts: 7,280
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Re: Vintage Air voltage drop
I think the compressor doesn't pull amps does it? It just grounds and engages the clutch. Is that correct? Unless a computer controlled vehicle has something else?
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Master Chief, US Navy, Retired 1964 C10 Step-side Short Bed - In Progress 2009 2500HD Duramax LTZ 1948 GMC Panel 1956 Big Window Stepside 1953 5 Window Chevy Stepside 1932 Coupe New Seat Foam for Bench Seats? |
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#9 |
Moderator
![]() Join Date: Dec 2012
Location: ON, Canada
Posts: 2,156
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Re: Vintage Air voltage drop
Rule out a loose/slipping alternator belt before worrying about anything else.
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#10 |
Registered User
Join Date: Jan 2012
Location: St Louis Mo
Posts: 214
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Re: Vintage Air voltage drop
It sounds like you have a voltage drop or bad ground to the cab. If you still have 14 V at the battery your alternator is probably fine. If you had a voltage drop on the fan wire your fan would be slow but your voltmeter should not drop. It sounds like you may have a bad connection where the main power wire goes into the cab or possibly at the horn relay if you still pull cab power from there. Could also be a bad ground to the cab.
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#11 | |
1962 C-10
Join Date: Apr 2005
Location: Las Vegas, New Mexico
Posts: 4,978
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Re: Vintage Air voltage drop
Quote:
Stay safe! JC62 ![]()
__________________
Joseph Chavez ![]() "See the USA in a Chevrolet!!" ......................_____ .........________//__{\_____ ,,,,,,,/__(O)___//___/__(O)_/ 1962 C10 Shortbed Fleetside 327/th350 GV overdrive 1974 C10 Longbed Fleetside 350/th350 "The Trash Truck" 1999 Chevy 2500 OBS, Longbed 5.7/4L80E 4x4 2015 GMC Sierra SLE 1500 4x4 |
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