I recently had my fuel pump relay corrode on my 07 H3. I had to remove the fuse block to get it out and replace. I installed everything back the exact way and even took the time to clean and replace all my fuses. When it came time to re install I did not have my new relay yet so I used the hvac relay in the fuel pump slot. Was able to fire the engine up finally and move my truck to a better spot. I was able to roll my windows down when I did this. I parked my truck and the next day I replaced the hvac relay and my wipers and windows stopped working.

I have tried removing and reinstalling fuse block, have tried disconnecting batt and fuse block. No success. I have also checked the fuses for wipers and windows.

any suggestions before I get hosed by mechanic

 

Welcome to HF.

It is really a matter of retracing your last step and continue up the chain in reverse one item at a time. Once you start over, who knows where the issue is, you lost the ability to check one item at a time?

Does the truck start and run? If no.... go to #2 If yes, check for voltage at the fuse block for the windows and wipers.

#2 Did the wipers work along with windows using the HVAC relay?
If so, put the HVAC Relay back in and test, you may have a bad new fuel pump relay. Just because it is new does not mean it is free from defects.

When you remove the fuse block, there is a trick to putting it back together. You may have forced the fuse block together with the harness connectors below such that you bent/broke a pin and lost connection. Inspect the window and wiper pins if you take it back apart.

 

Thanks Doc!

truck runs and drives fine no issues, literally only the wipers and windows won’t work. That goes for washer fluid as well.

I have re traced my steps a few times now, and before taking my fuse block out I watched a few videos on the proper way to do it. I never had to force it and it has gone smoothly each time. Just to be sure I removed today and checked all pins and nil issues. The new relay went into the fuel pump slot and the hvac relay I used for the fuel pump slot to get my truck started (which was working) went back into the hvac slot and hvac is working great.

thought there may be a trick to these trucks as the electrical systems seems to be tricky

side note if you remove your hvac relay you will get get ABS traction control error and a msg saying Serv 4wd. Weird.

 

Check for voltage at the window, wiper and windshield pump fuse slots to make sure it got that far.

 

Check those crappy azzed battery terminals!