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07-04-2020
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#1 |
 
Join Date: Mar 2007
Location: Crystal Lake, IL
Posts: 7,193
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Fans on when ignition in accessory position
I have an issue with the fans turning on once the ignition switch is turned into the accessory position, as in supplying power, but the car is not running. I have reset the prom multiple times and even replaced the prom. disconnected the temp switch on the inj housing, and even trying jumpering the AC high pressure line switch
Thoughts, I think the only other potential issue is ECM?
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LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359 |
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07-04-2020
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#2 |
 
Join Date: Feb 2012
Location: Ledyard,CT
Posts: 8,221
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Re: Fans on when ignition in accessory position
Is the engine warm?
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07-04-2020
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#3 |
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Join Date: Mar 2007
Location: Crystal Lake, IL
Posts: 7,193
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Re: Fans on when ignition in accessory position
No this is from the moment you turn on the switch, even when dead cold
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LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359 |
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07-04-2020
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#4 |
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Join Date: Mar 2007
Location: Crystal Lake, IL
Posts: 7,193
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Re: Fans on when ignition in accessory position
I should probably mention its only the primary fan... and I did swap relays with same result
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LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359 |
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07-04-2020
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#5 |
 
Join Date: Jan 2006
Location: Decatur, AL
Posts: 1,119
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Re: Fans on when ignition in accessory position
Check if your A/C pressure switch is unplugged or bad. (on high side line with red upper body)
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Corvette95 Registry and Forum (*************) 1989 C4 Conv Wht/Gry Auto Hardtop Top Flight SOLD 1995 C4 Coupe Purple/Blk 6 Speed 1989 C4 Conv Wht/Red Auto SOLD 1996 C4 Conv Black/Tan Auto SOLD 1994 C4 Coupe Wht/Blk SOLD 1995 C4 ZR-1 White/Gry #278 Dual Dunn Head SOLD 1986 C4 Coupe Black/Red 4+3 SOLD 1990 C4 ZR-1 Red/Red #0454 |
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07-04-2020
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#6 | |
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Join Date: Mar 2007
Location: Crystal Lake, IL
Posts: 7,193
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Re: Fans on when ignition in accessory position
Quote:
I jumpered the connector ..... didnt change anything, also does the car have to be running to turn it on due to the pressure switch.... this happens on mine in accessory mode
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LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359 |
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07-04-2020
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#7 |
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Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,700
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Re: Fans on when ignition in accessory position
So Lee, with ignition ON but not running, do fans come on?
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[SIGPIC][/SIGPIC]Former Membership Chairman Former ZR-1 Registry - BOD 1972 Corvette 4speed base Coupe SOLD long time ago 1984 Corvette Z-51/4+3 SOLD 1992 Corvette ZR-1 Aqua/Gray #474 SOLD 1992 Corvette ZR-1 Black Rose/Cognac #458 2014 Honda VFR Interceptor DX |
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07-04-2020
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#8 |
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Join Date: Mar 2007
Location: Crystal Lake, IL
Posts: 7,193
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Re: Fans on when ignition in accessory position
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LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359 |
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07-04-2020
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#9 | |
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Join Date: Jan 2006
Location: Decatur, AL
Posts: 1,119
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Re: Fans on when ignition in accessory position
Quote:
__________________
Corvette95 Registry and Forum (*************) 1989 C4 Conv Wht/Gry Auto Hardtop Top Flight SOLD 1995 C4 Coupe Purple/Blk 6 Speed 1989 C4 Conv Wht/Red Auto SOLD 1996 C4 Conv Black/Tan Auto SOLD 1994 C4 Coupe Wht/Blk SOLD 1995 C4 ZR-1 White/Gry #278 Dual Dunn Head SOLD 1986 C4 Coupe Black/Red 4+3 SOLD 1990 C4 ZR-1 Red/Red #0454 Last edited by Corvette95; 07-04-2020 at 01:04 PM. |
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07-04-2020
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#10 | |
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Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,700
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Re: Fans on when ignition in accessory position
Quote:
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[SIGPIC][/SIGPIC]Former Membership Chairman Former ZR-1 Registry - BOD 1972 Corvette 4speed base Coupe SOLD long time ago 1984 Corvette Z-51/4+3 SOLD 1992 Corvette ZR-1 Aqua/Gray #474 SOLD 1992 Corvette ZR-1 Black Rose/Cognac #458 2014 Honda VFR Interceptor DX |
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Linear Mode
