So i just bought a b4000 pickup 5spd because my f150 as some of you know is being a PIA. Anyway the truck has eletrical 4x4 with manual hubs. When i turn the switch nothing happens. The 4wd/4wd low lights both flash 6x then go off then flash again while running , driving, koeo, anytime like an obd1 check engine light code flashing. Anyway i checked the wiring for the 4wd switch no power, went to the fuse interior no pwr, went to the engine fuse box power. You don't hear the transfer case engage at all as well. Any suggestions appreciated.

 

A relay maybe? You have no power past the under hood fusebox if I read right. Well that would mean the issue is there at that fusebox.

 

Sorry i was wrong i do have power to the interior fuse box. Just not the the switch.

 

So no power to the switch from the fuse box? Bad switch maybe? Or you could have a lose or broken wire that goes to the switch. Or you could have power to the switch but no power going from the switch to the transfercase. So that would still indicate a possible switch problem.

 

I have no pwr to the switch. I jumped the switch with power from the battery however it did nothing when i switched to 4hi/lo, i jumped the light for the switch light came on tried jumping the signal wire for the tcase nothing happened.

 

Does anyone have the wiring diagram? I printed one out but its so fliping confusing. All i need is the 4wd circuit one. Much apprecitated.