Really Weird HVAC blower relay issue
#1
Really Weird HVAC blower relay issue
Long story short, I was doing a custom wire tuck for the chassis harness and now I have a problem. Of course. To try and avoid problems like these, I extended each wire one at a time. I did go back and tear apart all my looming to make sure the wires were connected correctly.
The problem:
When sliding the blower adjuster, a relay starts clicking in in sync with the speed selected. EX: The higher or lower the speed, the quicker or slower the relay clicks.
None of the harness inside the car was touched and this problem just started. Only the chassis harness was modified. I know there were several wires in this harness that were spliced from the factory into multiple other wires. Maybe I missed joining a wire somewhere.
Does anyone have any pictures of the stock chassis harness laid out or any ideas why this would happen?
The problem:
When sliding the blower adjuster, a relay starts clicking in in sync with the speed selected. EX: The higher or lower the speed, the quicker or slower the relay clicks.
None of the harness inside the car was touched and this problem just started. Only the chassis harness was modified. I know there were several wires in this harness that were spliced from the factory into multiple other wires. Maybe I missed joining a wire somewhere.
Does anyone have any pictures of the stock chassis harness laid out or any ideas why this would happen?
#4
Moderator
iTrader: (1)
There are a few wires for the A/C where the front harness connects to the air con harness (FAC-01 and FAC-02) but not sure this is your problem. There are a few wires to the Ex-Hi relay which you can check. Do an advanced search w/the name hailers in the search box and you'll find some fairly detailed posts on how to possibly diagnose your problem. And make sure the ground wire for the relay is properly grounded.
One of many links found using the above search criteria:
https://www.rx7club.com/2nd-generati...orking-861824/
One of many links found using the above search criteria:
https://www.rx7club.com/2nd-generati...orking-861824/
Last edited by satch; 11-15-15 at 07:28 PM.
#5
Thanks for the response. I'll check those out and those search results. This never occurred before extending my front harness, so I feel this has to be part of the problem. It just doesn't make sense that the relay clicks faster or slower dependent on the speed selected. Something has to be shorting when the blower is activated.
There are a few wires for the A/C where the front harness connects to the air con harness (FAC-01 and FAC-02) but not sure this is your problem. There are a few wires to the Ex-Hi relay which you can check. Do an advanced search w/the name hailers in the search box and you'll find some fairly detailed posts on how to possibly diagnose your problem. And make sure the ground wire for the relay is properly grounded.
One of many links found using the above search criteria:
https://www.rx7club.com/2nd-generati...orking-861824/
One of many links found using the above search criteria:
https://www.rx7club.com/2nd-generati...orking-861824/
#7
All interior fuses checked out except the rear wiper fuse. Replaced this and no dice on fixing it (obviously, as this should have nothing to do with the blower)
Looked at some of the pages related to this with hailers info and I guess I will start tearing crap apart tmmrw.
I wonder if it could be the logicon? It provides grounds to several of these relays. Although, I've never had an issue with cold solder joints in this car yet.
I should also add that it does this with the temperature slider all the way to cold.
Looked at some of the pages related to this with hailers info and I guess I will start tearing crap apart tmmrw.
I wonder if it could be the logicon? It provides grounds to several of these relays. Although, I've never had an issue with cold solder joints in this car yet.
I should also add that it does this with the temperature slider all the way to cold.
Trending Topics
#10
MECP Certified Installer
Have you pulled the blower motor out? It sounds like a piece of vent fell down in there and the blower is hitting it, not the relay itself.
The reason I ask is because the blower is blowing in your video and I have had this happen to me before.
The reason I ask is because the blower is blowing in your video and I have had this happen to me before.
#11
Rabbit hole specialist
iTrader: (11)
I thought the same thing. It sounds a lot like the blower just hitting something. I believe three screws/bolts hold in the blower motor and one harness plug. Hopefully some debris will just fall out or you will be able to reach in there and dislodge whatever may be making the noise.
#12
MECP Certified Installer
I thought the same thing. It sounds a lot like the blower just hitting something. I believe three screws/bolts hold in the blower motor and one harness plug. Hopefully some debris will just fall out or you will be able to reach in there and dislodge whatever may be making the noise.
Yup, three phillips screws and it comes right down.
Thread
Thread Starter
Forum
Replies
Last Post
TomU
3rd Generation Specific (1993-2002)
2
12-30-23 12:14 PM
edgars95rx7
3rd Generation Specific (1993-2002)
1
10-19-15 08:01 PM