The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - 89 S10 Backup Lights Dead (how to remove NS/BU switch)

95 S_Trucker · 12-28-2018, 10:39 AM

At the NSS/BUS, you can jump the light green wire and the dark blue wire. Then turn the key on. See if your BU lights work. If they work, you know your switch is bad.

Those switches do go bad. I've replaced quite a few over the years.

12-28-2018, 10:39 AM	#5
95 S_Trucker Registered User Join Date: Oct 2009 Location: . Posts: 2,178	Re: 89 S10 Backup Lights Dead (how to remove NS/BU switch) At the NSS/BUS, you can jump the light green wire and the dark blue wire. Then turn the key on. See if your BU lights work. If they work, you know your switch is bad. Those switches do go bad. I've replaced quite a few over the years.