Overheating...fans not coming on

Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's, Olds 98 91-96, Buick Lesabres and Park Avenue 91-96. Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.
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Troxartes
SLE Member
SLE Member
Posts: 30
Joined: Fri Aug 08, 2008 5:57 pm
Year and Trim: 1998 Pontiac Bonneville SSEi

Overheating...fans not coming on

Post by Troxartes »

Weird bunch of events after an oil change....I've had an overheating problem for about a month, did the oil and figured that would do it. It didn't, but I discovered that the fans weren't turning on and thermostat was bad so I changed that and the coolant temp sensor just in case. Started it, and now the water pump is spraying, and the fans still aren't turning on unless I run the AC. Going to replace the water pump soon, but what could be making the fans not work? Could it be a fuse issue?
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95naSTA
Certified Bonneville Nut
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Joined: Wed May 21, 2008 11:47 pm
Year and Trim: 95 SLE
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Re: Overheating...fans not coming on

Post by 95naSTA »

It could be the fan relay(s).

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95 SLE... a keeper. 241k miles. Low and Slow.
97 BMW 528i
98 Infiniti vq35'd i30: 13.3@104mph, 30MPG Hwy (RIP)
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07 Infiniti G35s 6MT (Sold)
07 Ducati Monster S2R 800 with DS1000 swap
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Info on dropping a 92-99: Here.
Troxartes
SLE Member
SLE Member
Posts: 30
Joined: Fri Aug 08, 2008 5:57 pm
Year and Trim: 1998 Pontiac Bonneville SSEi

Re: Overheating...fans not coming on

Post by Troxartes »

OMG, thank you for the diagram! :banana: Will check this out and report back....
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