MALIBU Temp sensor or wiring

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565bbchevy

Geezer
Aug 8, 2011
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Temp sensors are also prone to failure along with not always being properly grounded.
 

Ribbedroof

Comic Book Super Hero
Supporting Member
Jan 4, 2009
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Have you verified that you are getting voltage to the relay?

Have you checked all wires for continuity?

Have you checked operation of the relay itself?

These are where I would start
 
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pontiacgp

blank
Mar 31, 2006
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If the fan does not start when you have #85 grounded and car running time to break out the curcuit tester the make sure you have constant power on #30 and when you have the car running power to #86
 
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Ratchet

Master Mechanic
Jan 10, 2018
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The dual electric fans are now coming on. A toggle switch under the dash has been added, a new 200* temp sensor has replaced the original one and some connections have been redone for more positive contact.
Thank you all for your advice, charts and suggestions.
 

fleming442

Captain Tenneal
Dec 26, 2013
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For future reference (sorry, I'm late), if you ever want to test a fan relay and are sure it's wired correctly, just put the temp sensor wire/negative trigger to the relay to ground. If the fans come on, it's the temp sensor. If not, it's something else. If it smokes and/or blows the fuse, the fans are bad or the wiring is wrong.
To the OP, I hope the relay is still in position. The fans shouldn't be run directly off a switch. The current draw is high to begin with and adding extra wire and an underrated switch will lead to premature failure.
 
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Ratchet

Master Mechanic
Jan 10, 2018
251
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For future reference (sorry, I'm late), if you ever want to test a fan relay and are sure it's wired correctly, just put the temp sensor wire/negative trigger to the relay to ground. If the fans come on, it's the temp sensor. If not, it's something else. If it smokes and/or blows the fuse, the fans are bad or the wiring is wrong.
To the OP, I hope the relay is still in position. The fans shouldn't be run directly off a switch. The current draw is high to begin with and adding extra wire and an underrated switch will lead
For future reference (sorry, I'm late), if you ever want to test a fan relay and are sure it's wired correctly, just put the temp sensor wire/negative trigger to the relay to ground. If the fans come on, it's the temp sensor. If not, it's something else. If it smokes and/or blows the fuse, the fans are bad or the wiring is wrong.
To the OP, I hope the relay is still in position. The fans shouldn't be run directly off a switch. The current draw is high to begin with and adding extra wire and an underrated switch will lead to premature failure.
The switch is a 50 amp. The relay is still in position. All is good.
 
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