Jump to content
Ultimate Subaru Message Board

Recommended Posts

1997 Impreza Outback Sport

Issue: No power to Blower motor

Things I have replaced in system already: Blower motor, Blower motor Resistor, *Climate control module (to see if the fan switch (actuator) was broken)), Blower Motor Plug (Then I realized could have just checked it first with a multimeter), Blower motor fuses. I bench tested the blower motor relay (which was very difficult to get to), and it clicks, shows continuity and voltage when powered, have a replacement on the way just in case. I have checked every fuse, every relay, the next step I suppose would be to make sure that the system is grounded properly and that no wires are damaged, not sure how to do that. 

What I know: No power is reaching the BM plug, BM relay clicks when I switch fan from "OFF" to "1" which also means power must be reaching the CCM, Bench tested BM, BM relay, Fuses-all either tested functional or were replaced anyway (BM relay will be replaced at the end of this week but it bench tested functional so I do not think that is the problem).

My Assets: A small tool box, a multimeter, 30Amp wire spools, butt connectors and heat shrink, YouTube

My questions are: How do I go about finding the wiring issue i.e. ground is poorly connected, or wire is damaged, or should I simply snip the lines from the BM relay to the BM and replace them, and how would I do that, (obviously I need replacement wire and to make sure the old wires are sealed off properly, but how do I make sure that I don't mess the system up, and that I can trust the wiring diagram I found to be enough information for me to connect a power and ground wire to the BM plug so it'll get power. 

*I replaced this with a used part, so maybe I got unlucky and got a bad fan actuator twice? should I buy a new actuator for the CCM? Is there a way to test if the actuator I have is good?

NOTE: The blower motor was making loud noises (like a bad bearing), but had power from 1-4 one day, the next day I only had power to 4 (bad resistor) and then one day I left my car to warm up with the fan on full blast and when I came back it had ceased to work entirely. I have scoured the forums for BM issues which has been helpful, but none have led me to a solution in my case. 

Attached is the wiring diagram that I am going off of, advice about what my next steps should be are greatly appreciated. 

Blower motor wiring diagram.svg

Link to comment
Share on other sites

I fixed the problem. Just me being a boob. I switched the fuses for the main fan and tested the butt ends of the fuses for the "heater" fuses, 2, both 15 amp, only the butt ends of the fuses are gonna show continuity no matter what, because that's not where the fuse blows. Rookie mistake. What got me was the diagram, it said that the fuses were 15 amp but I had only swapped the 20 amp ones to the MAIN FAN, not the blower motor, which has two fuses, both 15, and is labeled "heater" which to me is confusing but we got it in the end

Link to comment
Share on other sites

Please sign in to comment

You will be able to leave a comment after signing in



Sign In Now
 Share

×
×
  • Create New...