Driver Heat Seat doesnt work
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#5
Alright, check the fuse but I don't think that its because the lights are coming on. What it sounds like to me is a short somewhere, but get your owners manual out and check the fuse first and see if there is any info about those things in there. I love my heated seats but its aggravating having to keep turning them on every 20 min.
#7
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#8
Is your truck a 1998? If it is you might get more responses in that area?
One usual suspect is a relay under the hood that needs replacing. It is overloading. The second place to look, which is more work would be a broke grid on the heated mat in the seat.Look for the relay first.
One usual suspect is a relay under the hood that needs replacing. It is overloading. The second place to look, which is more work would be a broke grid on the heated mat in the seat.Look for the relay first.
#9
Now that I think of it the relay in your truck might be under the seat clipped to the bottom. The power travels through the fuse then to the relay. The relay trips like a timer shutting the power after a certain length. When these go bad they trip early. Not an expensive part. Good Luck let us know how you make out.
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i did a search maybe this will help SSCULLY gave a diagram it might point you in the right direction here is the link .
http://www.f150online.com/forums/ele...t-trouble.html
http://www.f150online.com/forums/ele...t-trouble.html
#12
Join Date: Jun 2002
Location: Under the flightpath of old ORD 22R
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Is your truck a 1998? If it is you might get more responses in that area?
One usual suspect is a relay under the hood that needs replacing. It is overloading. The second place to look, which is more work would be a broke grid on the heated mat in the seat.Look for the relay first.
One usual suspect is a relay under the hood that needs replacing. It is overloading. The second place to look, which is more work would be a broke grid on the heated mat in the seat.Look for the relay first.
The heated seats have a tenancy to burn through the wire right where your thigh would be on the seat bottom.
Ford uses a single element through the seat bottom, that is hooked in series with the seat back, and 1 fault in the entire circuit, the seat turns on, and then shuts right back off. The heated seat module is what turns the element on, and controls the temp shut off. The LED on the seated seat button is the status reported back from the heated seat module.
This is why the status LED turns on and shuts right back off, it cannot find the heated seat element, and rather than risk starting a fire, power is shut off.
BTW: No relay with the seated seats, line voltage right to the seated seat module. The switch turns the heated seat module on & Off.
Quick test, unplug the heated seat module, and use a meter to check resistance of the heated seat element ( diagram in the thread above ). You will see a high resistance, but it should not show as open ( or a close to 0 ohm reading ). Watch your meter scale setting when testing this, you will need at least the K or M range ( 1,000 or 1,000,000 ).
Last edited by SSCULLY; 11-19-2010 at 02:19 PM.
#13
Ding, ding, ding... we have a winner here !!! ( at least close enough to what happens )
The heated seats have a tenancy to burn through the wire right where your thigh would be on the seat bottom.
Ford uses a single element through the seat bottom, that is hooked in series with the seat back, and 1 fault in the entire circuit, the seat turns on, and then shuts right back off. The heated seat module is what turns the element on, and controls the temp shut off. The LED on the seated seat button is the status reported back from the heated seat module.
This is why the status LED turns on and shuts right back off, it cannot find the heated seat element, and rather than risk starting a fire, power is shut off.
BTW: No relay with the seated seats, line voltage right to the seated seat module. The switch turns the heated seat module on & Off.
Quick test, unplug the heated seat module, and use a meter to check resistance of the heated seat element ( diagram in the thread above ). You will see a high resistance, but it should not show as open ( or a close to 0 ohm reading ). Watch your meter scale setting when testing this, you will need at least the K or M range ( 1,000 or 1,000,000 ).
The heated seats have a tenancy to burn through the wire right where your thigh would be on the seat bottom.
Ford uses a single element through the seat bottom, that is hooked in series with the seat back, and 1 fault in the entire circuit, the seat turns on, and then shuts right back off. The heated seat module is what turns the element on, and controls the temp shut off. The LED on the seated seat button is the status reported back from the heated seat module.
This is why the status LED turns on and shuts right back off, it cannot find the heated seat element, and rather than risk starting a fire, power is shut off.
BTW: No relay with the seated seats, line voltage right to the seated seat module. The switch turns the heated seat module on & Off.
Quick test, unplug the heated seat module, and use a meter to check resistance of the heated seat element ( diagram in the thread above ). You will see a high resistance, but it should not show as open ( or a close to 0 ohm reading ). Watch your meter scale setting when testing this, you will need at least the K or M range ( 1,000 or 1,000,000 ).
#14
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I added a momentary DPDT rocker switch to the side of the console, to operate the passenger power seat forward / reverse action ( in addition to the factory one ), and this is the easiest way I figured out to install the 2 relays under there with the wiring changes.
#15