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02-21-2012, 08:21 AM
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CC Member
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Join Date: Feb 2005
Location: Perrysburg,
OH
Cobra Make, Engine: SPF #298 427 FI
Posts: 497
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Not Ranked
Electrical question
Last summer I had a cigarette lighter that I was trying to remove short out and fry a couple relays. I replaced the one that controls the fans, its a manual swithch. I also replaced the switch. Once I replaced it one of the fans will not shut off until I turn the switch on, then the other one turns on and the one that is already on shuts off. I did arch the relay when I replaced it, could I have damaged that relay also? any suggestions?
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02-21-2012, 08:33 AM
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CC Member
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Join Date: Jun 2008
Location: Chester Springs,
PA
Cobra Make, Engine: Kirkham 289 FIA #690, FRPP 427 Boss engine
Posts: 764
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Not Ranked
Important safety tip: Shut off power before removing/installing electrical components!
The problem as you are finding is that a short can cause all sorts of problems. At best the affected component stops working completely. I recommend to ring out (check continuity) of your fan circuit. It sounds lke a ground problem where you are getting stray current backfeeding through one fan. You also should double check your replacement job. There's a good chance you mis-wired it.
__________________
RCR GT40 SOLD to Fast 5
Kirkham #690 289 FIA
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02-21-2012, 08:39 AM
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CC Member
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Join Date: Sep 2002
Cobra Make, Engine: SPF#0760
Posts: 3,407
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Not Ranked
Send me an email message off line with a contact number and /or email. I'd be happy to help you out with this... Could be as simple as the wrong relay.
__________________
Wiring Diagrams: SPF MKII, MKIII, GT40, CSX7000, CSX8000, Corvette Grand Sport, and Shelby Sebring, Bondurant & Cinema Tribute Cars.
Owner’s Manuals: SPF MKII, CSX7000, CSX8000, Sebring, Bondurant, Cinema Tribute Cars $ GT40’s..
Large, easy to read and trace schematics with part numbers, wire colors, wire gauge, fuses, and electrical upgrade information. Trouble-shooting and replacement part numbers for those roadside repair adventures.
SPFWiringDiagrams@Comcast.net
Last edited by Blas; 02-21-2012 at 08:47 AM..
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02-22-2012, 05:07 AM
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CC Member
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Join Date: Sep 2002
Cobra Make, Engine: SPF#0760
Posts: 3,407
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Not Ranked
Keep us posted as to your findings and relay replacements....
__________________
Wiring Diagrams: SPF MKII, MKIII, GT40, CSX7000, CSX8000, Corvette Grand Sport, and Shelby Sebring, Bondurant & Cinema Tribute Cars.
Owner’s Manuals: SPF MKII, CSX7000, CSX8000, Sebring, Bondurant, Cinema Tribute Cars $ GT40’s..
Large, easy to read and trace schematics with part numbers, wire colors, wire gauge, fuses, and electrical upgrade information. Trouble-shooting and replacement part numbers for those roadside repair adventures.
SPFWiringDiagrams@Comcast.net
Last edited by Blas; 02-22-2012 at 05:15 AM..
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02-24-2012, 03:49 PM
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CC Member
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Join Date: Oct 2007
Location: Near Emerald,
Qld
Cobra Make, Engine: Evans kit, 6 litre, 6 speed, Jag F/R,
Posts: 366
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Not Ranked
I'd be guessing that the new relay is a 'changeover' type. ie, when energised it connects one of the output pins, when non energised it flicks back to the other output pin. This would explain why they are both doin g the opposite of each other.
Grab another standard relay and try it.
__________________
Missed my Cobra budget by thaaaat much.
Ya get that on big jobs.
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02-25-2012, 07:51 AM
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CC Member
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Join Date: Feb 2005
Location: Perrysburg,
OH
Cobra Make, Engine: SPF #298 427 FI
Posts: 497
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Not Ranked
I believe it is the relay but no parts store around here seems to be able to find it. Anyone have a number for the under dash relay? Blass gave me one but I must have wrote it wrong because no one can find it.
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02-25-2012, 09:29 AM
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CC Member
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Join Date: Sep 2002
Cobra Make, Engine: SPF#0760
Posts: 3,407
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Not Ranked
As I mentioned, it's the same relay as your Start Inhibit relay.
Remember to send me the number on your current relay (I want to verify that you have the wrong one and not fused wires somewhere)(sent the number on the Start Inhibit relay too)
Bosch #0 332 019 151 (No Bracket) (12V - 30A)
TRUCK-LITE #191 (No Bracket) (12V - 40 AMP)
Hella #HL87118 (4RA 003 510-26) (Bracket) (12V - 40A)
Hella #HL87483 (4RA 003 510-13) (No Bracket) (12V - 40A)
TYCO #V23234-C0001-X006 (No Bracket) (12V–30A)
Please note: All this info is contained on my MKIII Wiring Diagrams. (see below)
__________________
Wiring Diagrams: SPF MKII, MKIII, GT40, CSX7000, CSX8000, Corvette Grand Sport, and Shelby Sebring, Bondurant & Cinema Tribute Cars.
Owner’s Manuals: SPF MKII, CSX7000, CSX8000, Sebring, Bondurant, Cinema Tribute Cars $ GT40’s..
Large, easy to read and trace schematics with part numbers, wire colors, wire gauge, fuses, and electrical upgrade information. Trouble-shooting and replacement part numbers for those roadside repair adventures.
SPFWiringDiagrams@Comcast.net
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02-25-2012, 12:04 PM
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CC Member
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Join Date: Feb 2005
Location: Perrysburg,
OH
Cobra Make, Engine: SPF #298 427 FI
Posts: 497
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Not Ranked
fixed, it was the relay, thanks blass and everyon else, Blass the check for the diagram is on the way.
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02-26-2012, 06:37 AM
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CC Member
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Join Date: Sep 2002
Cobra Make, Engine: SPF#0760
Posts: 3,407
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Not Ranked
Great, now what's the operational status of the temperature switch on the radiator? If I recall from our phone conversations that was not operational. With the car off and cold, attach the two wires from the radiator switch together, both fans should come on. (BTW: The fans should be pulling air into the engine compartment) Let me know.
__________________
Wiring Diagrams: SPF MKII, MKIII, GT40, CSX7000, CSX8000, Corvette Grand Sport, and Shelby Sebring, Bondurant & Cinema Tribute Cars.
Owner’s Manuals: SPF MKII, CSX7000, CSX8000, Sebring, Bondurant, Cinema Tribute Cars $ GT40’s..
Large, easy to read and trace schematics with part numbers, wire colors, wire gauge, fuses, and electrical upgrade information. Trouble-shooting and replacement part numbers for those roadside repair adventures.
SPFWiringDiagrams@Comcast.net
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