What did you do to your NNBS GMT900 Tahoe/Yukon Today?

[R3cord303]

you might be able to get them working temporarily using the tp92/95 that I posted earlier I just looked in my fuse box I would imagine either one of those pins would either take 12v or a ground, you would need to check the pin to see if it it's hot or not, then hook up a toggle switch, janky but it would give you wipers (i think)

Does that book have an actual diagram By chance or does it just have pinouts?

 

[R3cord303]

I got it working! Its real meth-y the way i’ve got it set up right now though. Pics incoming

 

[R3cord303]

So this is real methed up, but heres how I’ve got wipers right now. Its an Add-A-Circuit in the stock wiper fuse location, that goes to a light switch, that then goes to the purple wire on the wiper transmission. When purple is switched high, the wiper controls in the cab work fine. So when i park the car, i will pop the hood and turn off the light switch. This will get me by until this weekend when i can pull a replacement junction box from the wrecking yard and add another body ground

 

[R3cord303]

Update: that didnt work. I mean, it did for a while but it blew the 25 amp fuse. I think i need less/ heavier gauge cable.

 

[avalonandl]

I bet your wiper motor is going south and drawing more current.

 

[R3cord303]

Update: no dice. :/

 

[R3cord303]

I bet your wiper motor is going south and drawing more current.

not sure. I dont have enough exposed copper on the purple wire. Gonna get a replacement tomorrow or wednesday morning

 

[Doubeleive]

Does that book have an actual diagram By chance or does it just have pinouts?

it just shows the pin out, there are limited notated diagrams in the manual, it's a .pdf that someone made and sold on ebay, there may be more diagrams but this file is like 11,818 pages long, lol
so when I am looking for something I just search using a keyword

***and being the nnbs trucks are more serial bus controlled than the older trucks it's more dependent on the bcm, a single wire can control multiple devices via serial data bus

 

[R3cord303]

it just shows the pin out, there are limited notated diagrams in the manual, it's a .pdf that someone made and sold on ebay, there may be more diagrams but this file is like 11,818 pages long, lol
so when I am looking for something I just search using a keyword

***and being the nnbs trucks are more serial bus controlled than the older trucks it's more dependent on the bcm, a single wire can control multiple devices via serial data bus

I wish I could get nnbs body with nbs electrics and powertrain :/

 

[R3cord303]

So I'm looking for replacement junction fuse blocks for the tahoe, I bought one from the wrecking yard that came off a 2008 LT Tahoe- its got a sticker on it that says "SX" whereas the one off mine has a sticker that says "UT" and there are some pins on the bottom that are different. Mine has a few extra ones in some places and the parts yard one has a couple that are missing. I'm reading on GM Parts Direct that the actual part number is compatible with all LS/LT/LTZ trim levels? What gives? I have all the fuses pulled out and the panel is sitting in the oven set to 190* drying out.

 

[Doubeleive]

So I'm looking for replacement junction fuse blocks for the tahoe, I bought one from the wrecking yard that came off a 2008 LT Tahoe- its got a sticker on it that says "SX" whereas the one off mine has a sticker that says "UT" and there are some pins on the bottom that are different. Mine has a few extra ones in some places and the parts yard one has a couple that are missing. I'm reading on GM Parts Direct that the actual part number is compatible with all LS/LT/LTZ trim levels? What gives? I have all the fuses pulled out and the panel is sitting in the oven set to 190* drying out.

my first guess would be the sticker just indicates what plant it came from, the pins present or missing are probably indicative of what the trim level was on the vehicle it was removed from

 

[iamdub]

I don't think the wiper circuit should be pulling 25 amps. Yes, your fuse block may be bad, but it could've been damaged from the motor drawing too many amps. It's worth investigating to ensure you don't burn up the replacement fuse block.

 

[R3cord303]

my first guess would be the sticker just indicates what plant it came from, the pins present or missing are probably indicative of what the trim level was on the vehicle it was removed from

Part number on old block is 15092625 and part number on the one i pulled from yard is 25815387. The lady at another yard I went to said 07-09 interchange, and the 5.3 vs the 6.2 also interchange but who knows if shes correct or not.

This listing makes me think they do interchange? https://www.justparts.com/Auto_Parts/GM-OEM-Fuse-Relay-Junction-Block-19210438/26210732

I don't think the wiper circuit should be pulling 25 amps. Yes, your fuse block may be bad, but it could've been damaged from the motor drawing too many amps. It's worth investigating to ensure you don't burn up the replacement fuse block.

It was blowing fuses because I only had like 1/16 of an inch exposed on the purple wire and no way to maintain a solid connection.

 

[Doubeleive]

according to that link then these should crossover: 19210438, 19210440, 25796803, 15910897, 25815387, 25815389

 

[BG1988]

I wish I could get nnbs body with nbs electrics and powertrain :/

front end swap

 

[gooffeyguy]

Who needs wipers anyway? Remove the arms and the motor and free up some weight and reduce wind resistance!!

 

[R3cord303]

Replaced fuse block. Wipers inop still. ******.

 

[Doubeleive]

Replaced fuse block. Wipers inop still. ******.

weird, is there power at the fuse?

 

[R3cord303]

weird, is there power at the fuse?

Checking now

 

[R3cord303]

@Doubeleive blown.