It does sound like a relay stuck on. You may need a wiring diagram to see if another relay is at play here.
What happens when you pull the relay? If you have the one and only, it should stop the motor from running. Or maybe the fan switch has a short and won't shut off.
http://www.bbbind.com/technical.html
You can find a wiring diagram there. Click on TSB's and wiring diagrams, agree to end user license agreement, click on wiring diagrams, and enter your vehicle information. Then look for HVAC controls. Not the easiest site to navigate-you have to keep going back to search, but it's a huge database with free wiring diagrams for all makes and models going back to 1986.
SOURCE: 1992 cadillac deville - hvac blower motor does not shut off.
replace the relay , when a relay sticks like that , a good test is to slap it with something like the handle of a screw driver , see if it un-sticks , its not a fix , just a test . cheers'
SOURCE: blower motor does not work
I had the same problem, replace, replace, replace. Check, check and recheck. What I found was the blower motor resistor, located in the blower squirrel cage area, two prongs and a curly wire, was bad. Took the new one back, (it ohmed out okay, continuity ok, all ok!) replaced it with another, and Bingo, problem solved. Frustrating to say the least. After two relays and a blower switch, and test, test and retest. It was a faulty resistor. Made in Mexico. And no guarentee, even though new, it works. Trial and error. Even the dealer parts are Honcho en Mexico. Thanks NAFTA. You gonna make us all welfare babies.
SOURCE: Heater/defrost/ac fan not coming on park avenue...can hear click
Check the connector to the blower motor. Turn it on and wiggle the connector.
SOURCE: blower motor not working at all. 2003 ram
the resitor operates ground, if theres no power then its a bad fuse under the hood in the power fusebox, or #10 fuse inside the leftside of dash, power for the blower comes from the ignition switch,double check all fuses,if you had no ground to blower then i would say the resistor,make sure you have a good ground on the test light, then check for power with key on again, heres a wiring diagram to help you, good luck.
Testimonial: "The connection on the resistor was bad. Thank you for your help."
SOURCE: problems with blower motor resistor
having same problem . no burnt resister or wires but no fan
127 views
Usually answered in minutes!
×