Fr3Ak Posted April 18, 2019 Share Posted April 18, 2019 Hay all! My blower motor in Mazda doesn't work, so I start hunting down what could be. Found some different threats about Blower motor resistor and so on, but still couldn't fix the problem. I took out Blower motor, connect to 12 V and works fine. I took out blower motor resistor and have no idea if it's good or not (check pictures). I clean it a bit, but still quite rusty. I tried with instrument and it has ~0.5Ω on some pins. I thought that green stuff could be some kind of corrosion but guy at wreck shop said that is isolation? So I took instrument and start checking if there is any 12 V on connector, but nothing get's there. So when I change my switch level from 0 - 1 - 2 - 3 - 4 nothing happens and there is no 12V on any of connectors (I checked on Blower motor and resistor). But when I change to position 1 and 2, ECO light goes ON and radiator fan start working, on position 3 and 4 light go OFF and radiator fan stop working. I don't know how those things are connected? Otherwise my radiator fan work after my temperature goes above 90 (or whenever thermostat open it). So my questions are: 1. Is that Blower motor resistor looks good or should I change it? Where could I find one? Been to local wreck shops and they have same as my (old rusty), but couldn't found new one. 2. How can I test existing Blower motor resistor if it works? 3. Where should I get 12 V before goes to resistor? I saw on Mazda forum that on position 4 (full speed) that should bypass resistor and motor should work. 4. Any other solution how to get it work? No I won't change car p.s. It's Mazda Capella (626) Cargo, 1989, 2.0 diesel Quote Link to comment Share on other sites More sharing options...
governorsam Posted April 18, 2019 Share Posted April 18, 2019 Green stuff is factory to keep the coil windings apart. Use a test light to check for power, meters can give false readings on stuff like this. Looks like there is a circuit breaker in there? The 2 terminals on their own. The resistor circuits are usually the 4 pin plug. 1 in 3 out. Quote Link to comment Share on other sites More sharing options...
governorsam Posted April 18, 2019 Share Posted April 18, 2019 Also check where the terminals are riveted on, bit of solder can fix that. Common point for corrosion Quote Link to comment Share on other sites More sharing options...
ajg193 Posted April 18, 2019 Share Posted April 18, 2019 Have you checked your fuses? Quote Link to comment Share on other sites More sharing options...
Fr3Ak Posted April 18, 2019 Author Share Posted April 18, 2019 46 minutes ago, governorsam said: Also check where the terminals are riveted on, bit of solder can fix that. Common point for corrosion I checked all terminals and looks good, no mark of corrosion. I'll check with light as you said. Thanks 25 minutes ago, ajg193 said: Have you checked your fuses? Yes, forgot to mention that - first thing that I checked. The only thing that I didn't check is Blower motor relay, because I don't know where it is. I checked workshop manual now, but still have no clue where that could be. Page 1062 - http://www.pmx626.info/US/Mazda 626 & MX-6/Work Shop Manuals/PDF/1992 US Workshop Manual_OCR.pdf Thanks for help guys! Quote Link to comment Share on other sites More sharing options...
Fr3Ak Posted April 19, 2019 Author Share Posted April 19, 2019 So today I managed to fix some things. Now blower is working on position 3 and 4 - which is a progress. As I assumed, the problem was at blower motor relay, which I couldn't find the other day. I follow workshop manual step by step, checking wires and voltage, and everything is ok now. The problem is still with blower motor resistor. I check ohms on terminals, and couldn't get results from 2 terminals - I assumed that is damaged. So my question now is, where could I find a new one? Any helpful link? Thanks Position of relay One of the connection was broken So I changed all connectors with new p.s. Workshop manual http://www.pmx626.info/US/Mazda 626 & MX-6/Work Shop Manuals/PDF/1992 US Workshop Manual_OCR.pdf 1 Quote Link to comment Share on other sites More sharing options...
kiwisurf Posted April 30, 2019 Share Posted April 30, 2019 We used to replace 100's of the resistors on those Mazda's when I did my time. But generally they would only work on a single speed if at all when they were faulty. Have you tried mazda to see if they have them new still? Quote Link to comment Share on other sites More sharing options...
Fr3Ak Posted May 1, 2019 Author Share Posted May 1, 2019 Nah, didn't bother anymore. Couldn't find it on ebay or trade.me so I'm satisfied with speed 3 and 4 Quote Link to comment Share on other sites More sharing options...
UTERUS Posted May 1, 2019 Share Posted May 1, 2019 https://www.rockauto.com/en/catalog/mazda,1990,626,2.2l+l4,1189841,heat+&+air+conditioning,blower+motor+control+module+/+resistor,6557 Quote Link to comment Share on other sites More sharing options...
Fr3Ak Posted May 1, 2019 Author Share Posted May 1, 2019 I found those, but it's differed shape from current one so I didn't bother. And also I would need to drill extra holes in new part. Original: https://postimg.cc/KRtq6DJ8 Quote Link to comment Share on other sites More sharing options...
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