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Newbie needs some help https://cimg0.ibsrv.net/gimg/www.thi...234365b793.jpgSo I found this today. 91 RS 305. Any ideas what it is. I'm thinking fan switch . |
Re: Newbie needs some help Looks like the ac pressure switch |
Re: Newbie needs some help Thank you! I'm have slight trouble with fan. I found this and was hoping the fan switch hadnt broken off in the block . |
Re: Newbie needs some help The fan switch in located in the block between cylinder 6&8 on a v8. If the fan switch wire gets grounded the relay sends power to the fan. |
Re: Newbie needs some help Here is a schematic for tpi, the wiring on the lower fan is the same for tbi. The ac pressure switch on cylinder head switch being grounded will command on the fan. https://cimg1.ibsrv.net/gimg/www.thi...0a84879e9.jpeg The relay is on the bulk head next to the master cylinder. |
Re: Newbie needs some help Thank you. That is a huge help. I'm new to tbi. I usually tinker with VWs. Water and air cooled. |
Re: Newbie needs some help A lot of times the connector becomes brittle and breaks. If you need a new one here’s a link to one. https://m.ebay.com/itm/GM-Knock-Sens...UAAOSwNSxVNx-6 If the switch has failed a gn sw555 is a good replacement on at 210f off at 205f Stock iirc is on at 226f. https://m.autozone.com/cooling-heati...03831_0_0?aqs= |
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