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post #1 of 31 Old 04-26-2009, 10:45 AM Thread Starter
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Front End Wiring Harness, easy to install?

Is the front end wiring harness easy to install? I'm having a problem with my A/C not working and it's because the compressor wont turn on, everything else is fine. For some reason, the signal is not getting to the compressor so I took it to the dealer so they can check what was the problem. They told me that I need the Front End Wiring Harness (Part #32100-SDB-A21) and that will fix the problem, but they want $800 to install, that's crazy. I check the wiring harness online and it cost between $55-$65 (the dealer was gonna charge me $95 for this), and I saw the hardness graph, it's #1 in the attached image. If I take it to a private shop (A/C shop, or electrical shop, not sure which one to go to), do you think they will charge less than $100 for the labor or is this really that hard to install that will cost me so much. Any help highly appreciate it. Thanks.

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post #2 of 31 Old 04-26-2009, 12:03 PM
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i bet

its not the harness :P

dealership will charge you and then just kinda tell you that it wasnt the problem

are you sure your compressor isnt turning on? are you sure you dont just need a recharge of the system? dont jump to conclusions and spend 800$



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post #3 of 31 Old 04-26-2009, 12:42 PM
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I agree, second opinion would be my first thought. The wiring is like "Where's Waldo?" Wiring #1 doesn't look like a fun project to do on your own.
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post #4 of 31 Old 04-26-2009, 01:15 PM Thread Starter
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i bet

its not the harness :P

dealership will charge you and then just kinda tell you that it wasnt the problem

are you sure your compressor isnt turning on? are you sure you dont just need a recharge of the system? dont jump to conclusions and spend 800$
I already did have a mechanic check it before I took it to the dealer. I did a recharge and it still wasn't working. Then the mechanic did something to the sensor or plug (or fuse, not 100% sure what he did) that turns on the compressor, he put like one of those things that give electric shock/charge to that plug or fuse, and the compressor will be on while he was doing that and the system was cooling fine. Then when he stopped, no more cooling again. He told me that something electrical is wrong because everything seems fine except that the compressor is not turning on through the A/C controls. He tried all he could, but he couldn't get it to work so he suggested I take to the dealer so they can find out exactly what is wrong. Then at the dealer I was told that I need the front end harness.

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post #5 of 31 Old 04-26-2009, 01:16 PM Thread Starter
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I agree, second opinion would be my first thought. The wiring is like "Where's Waldo?" Wiring #1 doesn't look like a fun project to do on your own.
I know, I don't think I will do it on my own. I just wanted to know if it's really that expensive because $800 for labor seems way too much.

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post #6 of 31 Old 04-26-2009, 01:31 PM
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Looking at harness #1, it looks like there would be a lot of disassembly needed under the hood to replace it.
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post #7 of 31 Old 04-26-2009, 04:42 PM Thread Starter
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Looking at harness #1, it looks like there would be a lot of disassembly needed under the hood to replace it.
Yeah, it does seems like that. So one question, if I want to go to an independent mechanic, should I go to an A/C tech or to an Auto Electrician or something similar. I will ask for quotes locally to see if anyone can come up with a reasonable price for the job.

Do you still think I should let some else check the car again, because if the A/C guy did something to it that turned on the compressor, doesn't that mean, everything is connected and it might just need a fuse or something?

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post #8 of 31 Old 04-26-2009, 04:56 PM
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I don't know enough about that to give you an answer. I don't trust any mechanic with my Accord.
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post #9 of 31 Old 04-26-2009, 04:59 PM
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The more scary thought is if the harness is fine, but it's the integrated controller that's not sending the signal to engage the A/C compressor.......

I would be suspecious how the dealership determines if the harness was the problem? Did they see anything that's physically damaged? Harness doesn't usualy just go bad by itself unless it was damaged by weather elements, rodent, careless mechanic, etc., it's not a wear and tear item in a 4 year old car!

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post #10 of 31 Old 04-26-2009, 05:16 PM
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has the car ever been in an accident?
It's possible one of the wires has opened inside the harness and trying to find it without completely opening it up sure wouldn't be easy or not time consuming.

I'd figure about 10 hours to change that harness, bumper, lights, rad, condenser, and whatever other components need to come off to get it out. It's not like its out in the open.

There are many things that can disable the compressor, if the hvac head sees something it doesn't like, it'll shut it down, also the signal from the hvac head goes out to the PCM and the PCM grounds the compressor relay.

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post #11 of 31 Old 04-26-2009, 06:01 PM Thread Starter
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I don't know enough about that to give you an answer. I don't trust any mechanic with my Accord.
Yeah, that's the problem for everyone, but I have to believe someone since it's not working.

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post #12 of 31 Old 04-26-2009, 06:03 PM Thread Starter
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Originally Posted by Aviography View Post
The more scary thought is if the harness is fine, but it's the integrated controller that's not sending the signal to engage the A/C compressor.......

I would be suspecious how the dealership determines if the harness was the problem? Did they see anything that's physically damaged? Harness doesn't usualy just go bad by itself unless it was damaged by weather elements, rodent, careless mechanic, etc., it's not a wear and tear item in a 4 year old car!
They actually serviced the car for about 45min looking for the problem and then came up that the harness is broken and needs to be replace. I think they did it physically since that's the only way to know. But who knows who to believe.

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post #13 of 31 Old 04-26-2009, 06:09 PM Thread Starter
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Originally Posted by Fredsvt View Post
has the car ever been in an accident?
It's possible one of the wires has opened inside the harness and trying to find it without completely opening it up sure wouldn't be easy or not time consuming.

I'd figure about 10 hours to change that harness, bumper, lights, rad, condenser, and whatever other components need to come off to get it out. It's not like its out in the open.

There are many things that can disable the compressor, if the hvac head sees something it doesn't like, it'll shut it down, also the signal from the hvac head goes out to the PCM and the PCM grounds the compressor relay.
The car has not been in an accident. I think they probably checked for all that since they supposedly "checked" for the problem.

I think I'm just gonna go back to the A/C mechanic that did something and got it to work at least temporarily at his shop and ask him if he thinks that's the problem or if he can do anything like a switch or something where I will manually turn on the compressor. He did say it was an electrical problem since everything seems to be working fine. I really don't know what to do, but it's getting hot here in NY already. He's in A/C mechanic, do you think I will be better seeing him or going to an Auto Electrician instead?

I really don't want to spend more money on checking the car alone since I paid $100 at the dealer already for the check up and $100 at the A/C mechanic for the recharge and checking out why it was still not working so that's $200 already and the problem has not been fixed yet.

Thanks all for the replies and your help. Any other input by anyone else highly appreciate it.

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post #14 of 31 Old 04-27-2009, 08:26 AM Thread Starter
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Quote:
Originally Posted by Fredsvt View Post
has the car ever been in an accident?
It's possible one of the wires has opened inside the harness and trying to find it without completely opening it up sure wouldn't be easy or not time consuming.

I'd figure about 10 hours to change that harness, bumper, lights, rad, condenser, and whatever other components need to come off to get it out. It's not like its out in the open.

There are many things that can disable the compressor, if the hvac head sees something it doesn't like, it'll shut it down, also the signal from the hvac head goes out to the PCM and the PCM grounds the compressor relay.
Where is the compressor relay, I would like to check it out myself. I checked many forums and many people said that was the problem. I'll see what I can find out. Can anyone tell me how I can check the compressor relay?

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post #15 of 31 Old 04-27-2009, 09:02 AM Thread Starter
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I also wanted to add that when I do the HVAC self diagnostic test, I get these error codes

A: An Open in the In-car Temperature Sensor Circuit
F: A Short in the Sunlight Sensor Circuit
M: A Problem in the Mode Control Linkage, Doors, or Motor

Do you think this has anything to do with that or is it because the harness is broken that I'm getting all these codes. I asked the mechanic to check In-car temperature sensor circuit to see if anything is wrong, he said the "check engine" should come on if there is anything wrong with that sensor and didnt check it. Should I check all these problems or you guys think that has nothing to do with the compressor not turning on?


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