Sr20det reverse sensor not getting power - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Hbuscema · 07-24-2020, 10:27 PM

Trying to find out why my s14 reverse lights aren't working?
Put in tested to see if they was any power going to the reverse sensor but I got nothing, not sure where to look befor the sensor to find the problem.
Thanks

S14rebuild · 07-25-2020, 05:22 AM

Check the most foward sensor on the side of the trans... should have power on both wires when shifted in reverse

NukeKS14 · 07-25-2020, 06:33 AM

Side note; when troubleshooting the reverse lights on my s14a, I found out that they get power from the gauge cluster circuit. So if your gauge cluster works... there SHOULD be power to that harness point. May just be a faulty switch.

What I did was pull the harness connector to the reverse light switch and try to short it, manually, test the rest of the circuit after the switch.

If you want to know where to find what sensor does what on your tranny, FSM is your friend.

https://www.nicoclub.com/archives/us...-database.html

Hbuscema · 07-25-2020, 11:16 PM

Thanks for the reply guys, my cluster dose work but has aftermarket lights(I don't know if that would effect anything?), I tryed shorting it and I had no power from ether cable when the car was in accessory mode. Thanks

NukeKS14 · 07-26-2020, 05:58 AM

tried shorting what? which connector? did you reference the FSM to make sure you're on the right one?

LoSt180 · 07-27-2020, 01:29 PM

Reverse lights won't get power in accessory mode, the car need to be ON. Check your fuses. Then trace the wire from the reverse switch on the trans up to the connector under the fuse box next to the engine.

Hbuscema · 07-27-2020, 05:20 PM

Thanks for the reply again guys, I tried some of your suggestions out with no luck. End up skipping the trans sensor to see if anything was getting power and there was nothing. I checked all the most of the fuses and found nothing wrong except for the of the "electric parts" fuse was a 30omp instead of a 10omp specified, I swapped it out with a 10omp and it blow the fuse instantly, wondering if that fuse it linked to the aftermarket lights in the dash and in turn messing with the reverse sensor/lights circuit. But appart from this I'm not sure back track the wires from the trans sensor an I'm not sure what fuse it uses. Thanks again!

07-24-2020, 10:27 PM	#1
Hbuscema Join Date: Jul 2020 Location: Auckland newzeland Posts: 6 Trader Rating: (0) Feedback Score: 0 reviews	Sr20det reverse sensor not getting power Trying to find out why my s14 reverse lights aren't working? Put in tested to see if they was any power going to the reverse sensor but I got nothing, not sure where to look befor the sensor to find the problem. Thanks

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07-25-2020, 05:22 AM	#2
S14rebuild BANNED Join Date: May 2019 Location: Florida-FAIL Posts: 2,497 Trader Rating: (8) Feedback Score: 8 reviews	Check the most foward sensor on the side of the trans... should have power on both wires when shifted in reverse

07-25-2020, 06:33 AM	#3
NukeKS14 Zilvia Member Join Date: Apr 2019 Location: KS Posts: 221 Trader Rating: (1) Feedback Score: 1 reviews	Side note; when troubleshooting the reverse lights on my s14a, I found out that they get power from the gauge cluster circuit. So if your gauge cluster works... there SHOULD be power to that harness point. May just be a faulty switch. What I did was pull the harness connector to the reverse light switch and try to short it, manually, test the rest of the circuit after the switch. If you want to know where to find what sensor does what on your tranny, FSM is your friend. https://www.nicoclub.com/archives/us...-database.html

07-25-2020, 11:16 PM	#4
Hbuscema Join Date: Jul 2020 Location: Auckland newzeland Posts: 6 Trader Rating: (0) Feedback Score: 0 reviews	Thanks for the reply guys, my cluster dose work but has aftermarket lights(I don't know if that would effect anything?), I tryed shorting it and I had no power from ether cable when the car was in accessory mode. Thanks

07-26-2020, 05:58 AM	#5
NukeKS14 Zilvia Member Join Date: Apr 2019 Location: KS Posts: 221 Trader Rating: (1) Feedback Score: 1 reviews	tried shorting what? which connector? did you reference the FSM to make sure you're on the right one?

07-27-2020, 01:29 PM	#6
LoSt180 Zilvia Addict Join Date: May 2013 Location: MD Posts: 966 Trader Rating: (18) Feedback Score: 18 reviews	Reverse lights won't get power in accessory mode, the car need to be ON. Check your fuses. Then trace the wire from the reverse switch on the trans up to the connector under the fuse box next to the engine.

07-27-2020, 05:20 PM	#7
Hbuscema Join Date: Jul 2020 Location: Auckland newzeland Posts: 6 Trader Rating: (0) Feedback Score: 0 reviews	Thanks for the reply again guys, I tried some of your suggestions out with no luck. End up skipping the trans sensor to see if anything was getting power and there was nothing. I checked all the most of the fuses and found nothing wrong except for the of the "electric parts" fuse was a 30omp instead of a 10omp specified, I swapped it out with a 10omp and it blow the fuse instantly, wondering if that fuse it linked to the aftermarket lights in the dash and in turn messing with the reverse sensor/lights circuit. But appart from this I'm not sure back track the wires from the trans sensor an I'm not sure what fuse it uses. Thanks again!