I have an old thread I started when I was first troubleshooting but now I have a very specific scenario that I am looking to get more eyes on for feedback.


If I replace the Blower Motor Transistor things work for a few trips then it seems to short out. When I was working through the troubleshooting steps the one stage is to by pass the transistor by jumping black,black/blue on the power transistor connector (Blower Motor Transistor). In doing so within a short period of time I smelled some burning and noticed that my jump (paper clip) had become so hot it began to melt the plastic housing where it touched.


Any thoughts? The blower motor is brand new so I don't think it would be causing a draw issue.

 

That's a very specific scenario and it should be simple enough to figure out with a circuit diagram. Unfortunately I don't have access to the service manuals until I get home this evening. What year is your TL?

 

2004

 

2004-2006 Acura TL Electrical Troubleshooting Manual

http://techinfo.honda.com/RJANISIS/C...ord=&path=ETMs

 

EE love bro. Do you have something like that for 2008 models too (Type S)??? I would love to have that as a reference.

Here is the circuit:



It doesn't surprise me that a paper clip got that hot. The current going through it is quite substantial. Fuse 21 in the Under-hood fuse relay box is rated for 40A. Go check that first to make sure it's okay and has the correct rating.

When you say "short out" do you mean that the blower just stops working? And was the blower on when you stuck the paper clip in there? When did you put the blower motor in? Is it an Acura part? The blower motor is the most obvious culprit, but if you're saying it's new, we have to get creative in trying to figure this out.

 

2007-2008 Acura TL Electrical Troubleshooting Manual

http://techinfo.honda.com/RJANISIS/C...ord=&path=ETMs