 Blower troubles, Blower blows without being turned on |
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| Supersax |
 Jan 20 2023, 06:45 PM
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#1
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Newbie  Group: Members Posts: 1 Joined: 30-July 22 From: michigan Member No.: 26,727 Region Association: None  |
Hi Guys, I cleaned my ground points and also sprayed electronic cleaner on the relay board(4 days) ago. Now the blower comes on really loud when I turn the key on. I pulled the blower relay out and it stopped but the car would not start with or without the relay. I did use dielectric grease on the relay posts and I spread them out a little with a knife blade to make good contact. What did I f&%# up!?
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| JeffBowlsby |
Jan 20 2023, 06:53 PM
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#2
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914 Wiring Harnesses Group: Members Posts: 8,522 Joined: 7-January 03 From: San Ramon CA Member No.: 104 Region Association: None 
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QUOTE(Supersax @ Jan 20 2023, 04:45 PM)  Hi Guys, I cleaned my ground points and also sprayed electronic cleaner on the relay board(4 days) ago. Now the blower comes on really loud when I turn the key on. I pulled the blower relay out and it stopped but the car would not start with or without the relay. I did use dielectric grease on the relay posts and I spread them out a little with a knife blade to make good contact. What did I f&%# up!? By blower you mean heater fan in the engine bay? Probably not the current problem but lose the dielectric grease. Not good in any environment where it can attract dirt. You know about the secret heater fan lever in the cabin right? The fan should always be on when the lever is pulled up. Lever down fan is off. |
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| Superhawk996 |
Jan 20 2023, 07:40 PM
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#3
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914 Guru Group: Members Posts: 5,869 Joined: 25-August 18 From: Woods of N. Idaho Member No.: 22,428 Region Association: Galt's Gulch
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QUOTE(JeffBowlsby @ Jan 20 2023, 07:53 PM) lose the dielectric grease. Not good in any environment where it can attract dirt. (IMG:style_emoticons/default/agree.gif) Public service announcement. Definition of dielectric: insulating; does NOT conduct electricity. Really has no place in 12v automotive wiring. Want to use on high voltage spark plug wire terminals to help prevent condensation and arcing down wet wires? Sure - that is what it is intended for. Sounds like you pulled the power supply relay - not the blower (heater fan) relay. Power relay feeds power to the fuel pump relay and the ECU. Heater relay would not have any effect on starting the car unless something is massively miswired on your car.  Bench test the relay - may have gone bad. Old relays are notoriously fragile. The act of pulling it out of the relay board may have caused a connection inside the relay to break. Pins 85 & 86 are the control solenoid ; apply 12v pin 85 and ground pin 86 Should hear and feel the relay click when the solenoid is powered. pins 30 and 87 are the contacts; should measure zero ohms with solenoid powered. |
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| krazykonrad |
Jan 20 2023, 08:07 PM
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#4
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Senior Member Group: Members Posts: 1,127 Joined: 21-February 06 From: Canton, GA Member No.: 5,610 |
Jeff Bowlsby and Superhawk know what they are talking about. I, usually, do not. But I want to send you a (IMG:style_emoticons/default/welcome.png)
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