2003 3.3L Were is Radiator fan Relay & PCM?
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2003 3.3L Were is Radiator fan Relay & PCM?
I am getting a check engine light. Its code P1491.
I have read through a bunch of good posts about it.
Can someone clarify were the Radiator fan relay is exactly?
Also were is the PCM that I am reading about in this post here: https://dodgeforum.com/forum/dodge-c...ease-help.html
I am pretty sure that I have a corrosion issues like so many others have had here with this code. This started when things got wet under the hood and then the weather went below freezing outside.
I just dont know were these components are exactly located. Its toooo COLD outside to play hide and go seek for them. Brrrrr!!
If anyone has got pictures of were these are, please help me out and post what you got.
I have read through a bunch of good posts about it.
Can someone clarify were the Radiator fan relay is exactly?
Also were is the PCM that I am reading about in this post here: https://dodgeforum.com/forum/dodge-c...ease-help.html
I am pretty sure that I have a corrosion issues like so many others have had here with this code. This started when things got wet under the hood and then the weather went below freezing outside.
I just dont know were these components are exactly located. Its toooo COLD outside to play hide and go seek for them. Brrrrr!!
If anyone has got pictures of were these are, please help me out and post what you got.
The PCM would be behind the driver side headlamp. And the Radiator fan relay.
Open hood.
Disconnect and isolate the battery negative cable.
Remove the radiator crossmember to front fascia closure panel.
Disconnect the relay electrical connector.
Remove the rivet attaching the relay to the front bumper beam.
Remove the relay.
Open hood.
Disconnect and isolate the battery negative cable.
Remove the radiator crossmember to front fascia closure panel.
Disconnect the relay electrical connector.
Remove the rivet attaching the relay to the front bumper beam.
Remove the relay.
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There's a diagram of the rad relay location in this thread: https://dodgeforum.com/forum/dodge-c...-shut-off.html
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Thanks guys!
Oops. I allready knew were the ECU was. I thought PCM was another control module in between the ECU and Rad fan relay. Ok, Getting the lingo. For Dodge, ECU is PCM.
I can see the rad fan relay through my front lower grill on the drivers side. I got a new relay on order and it should come in next week. In the meantime, when the weather permits, I will verify all the wiring.
I dont know if the two problems are connected together somehow, but, at the same time this rad fan relay code is happening, my horn is also acting funny. It works fine but has a funny sound. It is like it has got a rag over it. The sound of the horn is a bit muffled.
The other day, I erased the rad relay code. Then I went for a drive. The second I beeped the horn, the check engine light came on. Weird!!! But I know the horn can send vibrations down the steel to the rad fan relay.
Can you guys tell me if corrosion is more often the culprit with this problem or do these rad fan relays fail often enough and just need to be replaced?
Either way, I have a new relay on order. I really hate sub zero outdoor repairs!
Oops. I allready knew were the ECU was. I thought PCM was another control module in between the ECU and Rad fan relay. Ok, Getting the lingo. For Dodge, ECU is PCM.
I can see the rad fan relay through my front lower grill on the drivers side. I got a new relay on order and it should come in next week. In the meantime, when the weather permits, I will verify all the wiring.
I dont know if the two problems are connected together somehow, but, at the same time this rad fan relay code is happening, my horn is also acting funny. It works fine but has a funny sound. It is like it has got a rag over it. The sound of the horn is a bit muffled.
The other day, I erased the rad relay code. Then I went for a drive. The second I beeped the horn, the check engine light came on. Weird!!! But I know the horn can send vibrations down the steel to the rad fan relay.
Can you guys tell me if corrosion is more often the culprit with this problem or do these rad fan relays fail often enough and just need to be replaced?
Either way, I have a new relay on order. I really hate sub zero outdoor repairs!