Friday, March 6th, 2020 AT 4:45 PM
NASER NASER
- MEMBER
- 2003 INFINITI FX35
- 6 CYL
- 2WD
- AUTOMATIC
- 244,000 MILES
Neither of the seats work, where do I start?
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POWER SEATS DO NOT WORK
16 Replies
JACOBANDNICKOLAS
- MECHANIC
- 109,747 POSTS
Hi,
I would start by checking the fuse in the power distribution box under the hood. See pic 1 for which fuse to check.
Next, if the fuse is good and there is power in and out, check for power to the switch itself. If there is power and they still don't work, you may have a faulty ground. See pic 2 for ground location.
Here are a few links you may find helpful when testing:
https://www.2carpros.com/articles/how-a-car-fuse-works
https://www.2carpros.com/articles/how-to-check-a-car-fuse
https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester
https://www.2carpros.com/articles/how-to-use-a-voltmeter
https://www.2carpros.com/articles/how-to-check-wiring
Let me know what you find or if you have other questions.
Take care,
Joe
I would start by checking the fuse in the power distribution box under the hood. See pic 1 for which fuse to check.
Next, if the fuse is good and there is power in and out, check for power to the switch itself. If there is power and they still don't work, you may have a faulty ground. See pic 2 for ground location.
Here are a few links you may find helpful when testing:
https://www.2carpros.com/articles/how-a-car-fuse-works
https://www.2carpros.com/articles/how-to-check-a-car-fuse
https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester
https://www.2carpros.com/articles/how-to-use-a-voltmeter
https://www.2carpros.com/articles/how-to-check-wiring
Let me know what you find or if you have other questions.
Take care,
Joe
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Friday, March 6th, 2020 AT 9:55 PM
NASER NASER
- MEMBER
- 836 POSTS
Somehow the passenger worked, fuse okay, couldn't find a ground under driver seat. How do I remove the switch to test it?
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Sunday, March 8th, 2020 AT 6:11 PM
JACOBANDNICKOLAS
- MECHANIC
- 109,747 POSTS
If I recall, the switch is clipped into the plastic molding on the side of the switch. Take a look at pic 1 and let me know if it helps.
Joe
Joe
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Sunday, March 8th, 2020 AT 8:52 PM
NASER NASER
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- 836 POSTS
No this switch is on the too right, pretty much part of the top of the seat, as most Nissan's are, not pike the pic.
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Sunday, March 8th, 2020 AT 9:27 PM
NASER NASER
- MEMBER
- 836 POSTS
What color wire at the switch should have power?
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Monday, March 9th, 2020 AT 6:14 PM
NASER NASER
- MEMBER
- 836 POSTS
Also there is battery voltage at the main harness going to the module under the seat, but at the switch once I opened it it only gives -2.6v, in minus.
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Tuesday, March 10th, 2020 AT 5:24 PM
JACOBANDNICKOLAS
- MECHANIC
- 109,747 POSTS
If the voltage is negative, make sure you don't have the polarity reversed. As far as the power supply, it comes through both a fusible link and a circuit breaker. The wire is white but splices to red before going into the control. Also, the ground between the two seats is spliced and ground is located under the driver's seat, attached to the floor.
See the attached pics. It shows the wiring schematic for both front seats.
Let me know if this helps you.
Joe
See the attached pics. It shows the wiring schematic for both front seats.
Let me know if this helps you.
Joe
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Tuesday, March 10th, 2020 AT 8:50 PM
NASER NASER
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- 836 POSTS
I will check these wires and supply again thanks. How can I have the polarity reversed?
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Wednesday, March 11th, 2020 AT 6:21 AM
JACOBANDNICKOLAS
- MECHANIC
- 109,747 POSTS
If you are using a digital multi-meter, you could have the supply and ground backwards. When the power flows through the meter backwards, it will read negative. It's not hard to have happen.
Let me know and I hope this is helping.
Take care,
Joe
Let me know and I hope this is helping.
Take care,
Joe
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Wednesday, March 11th, 2020 AT 7:09 PM
NASER NASER
- MEMBER
- 836 POSTS
But I used a test light.
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Wednesday, March 11th, 2020 AT 7:12 PM
JACOBANDNICKOLAS
- MECHANIC
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How are you getting a voltage reading from a test light?
Joe
Joe
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Thursday, March 12th, 2020 AT 4:31 PM
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I have a test light that comes with a display that shows voltage. It is one of those circuit testers with LCD.
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Thursday, March 12th, 2020 AT 4:37 PM
JACOBANDNICKOLAS
- MECHANIC
- 109,747 POSTS
I don't have one of those, but it sounds like I need one. LOL However, for you to show a negative voltage, power has to be traveling in a reverse manner or there is a draw pulling power the wrong way.
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Thursday, March 12th, 2020 AT 8:02 PM
NASER NASER
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- 836 POSTS
Turned out both the module under the seat and the switch were bad, got them installed and all good thanks !
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Friday, March 13th, 2020 AT 2:15 PM
JACOBANDNICKOLAS
- MECHANIC
- 109,747 POSTS
Great! Glad it's fixed. Something was back feeding power through your gauge. That is the only way I can think of to get a negative reading. Regardless, I'm glad it's fixed.
Now, I was on the Snap on truck today and they don't have a light like yours, so I have to ask where you got it. LOL
Joe
Now, I was on the Snap on truck today and they don't have a light like yours, so I have to ask where you got it. LOL
Joe
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Friday, March 13th, 2020 AT 9:43 PM
JACOBANDNICKOLAS
- MECHANIC
- 109,747 POSTS
Thanks! I like that and feel it is something I need. LOL
Take care and have a good weekend.
Joe
Take care and have a good weekend.
Joe
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Friday, March 13th, 2020 AT 10:47 PM
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