Back up reverse lights not working.

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My 1990 bronco 4x4 efI 351w. The back up lights works a couple years ago. Before I had the motor built they were not working. Now I'm fixing the truck up. I checked the bulbs. Both of them were fine. I checked the voltage at the lights had no volts. Checked and cleaned all connections to nss and under the hood. Any ideas what could be wrong.

 

miesk5

96 Bronco 5.0
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Yo broncoboyerusa,

Can you test for continuity at the connectors from the NSS TO the sockets?

http://www.revbase.com/BBBMotor/Wd/DownloadPdf?id=57159

1990-component-location-view-1514.jpg

Ground G100 Location in Engine Bay Diagram in a 90 5.0 & 5.8

Source: by Seattle FSB (SeattleFSB)

@ LH front of engine compartment on upper radiator support-in front of WS washer/Coolant overflow tank

Connectors;

SUPERMOTORS IS DEAD SLOW NOW, AGAIN.

SEE IF YOU CAN FIND THESE CONNECTOR LOCATIONS ON THESE IMAGES BY SEATTLEFSB @

http://www.supermotors.net/registry/20487/76450

C103 POSSIBILITY AT NSS

C134

C405 POSSIBLY Under LH rear of vehicle, on frame rail, near fuel tank

Or

C406 POSSIBLY Under LH rear of vehicle, near rear crossmember

 

miesk5

96 Bronco 5.0
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Yo,

FINALLY, THE SUPERMOTORS PAGE OPENED!

BUT, individual pages are still dead slow.

C103 POSSIBLY AT NSS

C134 @ 1990-component-location-view-15111.jpg

But shows MLPS, E4OD INSTEAD OF NSS AND AOD...PROBABLY SIMILAR

...

C405

And

C406 are shown in this diagram

1990-component-location-view-1519.jpg

Back-Up Lamps Harness Depiction @ 1990-component-location-view-15110.jpg

 
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Seabronc

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The circuit is simple, easily trouble shot with a meter.  The connector designation may not be the same for your truck but the circuit is the same.

:)>-

PG47.jpg

 
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Thanks for the help everyone. I checked the two wires to the nss and jumped them and it worked. So I replaced the nss after checking every connection turn out to beagles the nss afterall.

 

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