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Old 02-14-2010, 06:40 PM   eBay Motors  #1 (permalink)
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No shift indicator light?

Hello,

the gear light will not highlight (PRND321-dash) when I shift. Also my check engine light come on today. My doors will not automatically unlock once I put it in PARK. They use to.
AutoZone read the codes and said it was a (aa1.-failed tranmission range sensor), and/or aa2.- Open circuit condition. How hard is that to replace or is it dealership time?

thanks,

df
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Old 02-14-2010, 06:49 PM   eBay Motors  #2 (permalink)
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If the NSBU switch is bad usually there are more symptoms. If it is actually bad, they arent hard to replace.

Are you saying the indicator light wont show or none of the PRND321 isnt showing??
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Old 02-14-2010, 07:11 PM   eBay Motors  #3 (permalink)
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mine did that change the nsbu switch it will fix it
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Old 02-14-2010, 07:19 PM   eBay Motors  #4 (permalink)
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If you need to change it heres what you need to do. LB7 and LLY do differ, dont know hich your truck is, it would be a good idea to add this to your sig.

Some like to put the truck in nuetral as the NSBu switchs are shipped in nuetral. I dont do this.

Crawl under the truck on the drivers side and you will see the NSBu switch. Start by removing the nut on it with a 15mm then remove the shift linkage with the arm.

Next you will need to remove the connectors, on and LLY simply pull up on the locking collar as you pull the plug out.

On the LB7 grab a heat gun (heatshrink tubing size not oxy-acetalyne torch) and heat up one of the connectors, the wiggle it out and reheat as necessary, then do the same for the other connector. the reason you have to heat them is due to the resin on them, you will not get them off without heat and if you do your a better man than most.

Then using a 13mm remove the two nuts and slide the NSBu switch off. Then put the new one on, try to get it perfectly oriented in the same spot as the old one, if you dont the truck will not start. If the truck doesnt start you will have to adjust the position of the NSBU switch.

Reconnect everything and your good to go. (heat helps again to reconnect LB7 connectors)
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