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  1. M

    HVAC speed control

    thank you Bruce, ill see if I can splice those 2 wires I have and plug them to the resistor. Ill keep you posted on the outcome
  2. M

    No power to dash!! hELP

    any ideas on the lower hvac speeds?
  3. M

    HVAC speed control

    thank you, would I be able to splice those 2 wires and plug them directly to the resistor? if so does anyone have a picture so I can see where they should be plugged in?
  4. M

    HVAC speed control

    hello I have a 1980 GMC Jimmy that I purchased this summer. Never really used the heater until recently but noticed it only works on high speed. I replaced both the resistor and relay but still only works on high. This Jimmy was originally equipped with AC however some of the AC components have...
  5. M

    No power to dash!! hELP

    Almost Solved!!! Today I pulled the radio and replaced a fuse that was behind the unit. Radio is back in action Wipers work, all lights and signals work jimmy starts *heater still only operates on high after replacing both resistor and relay. After digging around I found some wires that have...
  6. M

    No power to dash!! hELP

    does anyone have any other suggestions on this? the only thing I haven't tried is to test the wires going into the fuse box as Chengy recommended. Im starting to wonder if I bought a defective ignition switch. Even tho the high speed on the blower goes off a different circuit than the lower...
  7. M

    No power to dash!! hELP

    Kind of a dumb question but will my acc options still work if I fried my alternator? I know I can start the vehicle with a fully charged battery and the alternator won’t charge it up if it’s bad but just wondering if that could cause radio and other items connected to acc to not operate?
  8. M

    No power to dash!! hELP

    Another quick update, replaced both blower resistor and relay and still only works on high also no radio either. I’m starting to wonder if maybe something to do with acc position in the ignition switch? Even tho I removed and reinstalled several times? I have no idea what else to check
  9. M

    No power to dash!! hELP

    Just added new resistor but still only have blower turning on high speed.
  10. M

    No power to dash!! hELP

    Say you had burned out all the elements in the resistor assembly (not unreasonable in light of the casualty), you would have no reduced blower speeds. But since power for blower HI speed operation by-passes the resistor stack, that should still be available. *ok I noticed something at the...
  11. M

    No power to dash!! hELP

    *quick update -blazer starts still needs slight pressure on the column to make contact but I can live with it for now -all lights function properly including hazard lights after replacing both flasher relays -still no power to radio or heater controls. Both fuses appear to be good? Any...
  12. M

    No power to dash!! hELP

    thank you for the info everyone, I haven't been able to dig around much, We have about 14" of snow outside and no garage to work in so its been a bit of delay on my end. Im planning on digging some more this weekend. I do have a couple of questions please. -It's as if it should be either one...
  13. M

    No power to dash!! hELP

    Radio is aftermarket I couldn’t find any inline fuses Blower not turning on vehicle was originally equipped with ac but is not in use. Signals are inoperable Will verify fuses today
  14. M

    No power to dash!! hELP

    Quick update on things -jimmy starts -headlights and tailights work -wipers work -no radio -no heater -replaced fusible links at junction block and starter -replaced battery -replaced ignition switch -checked all fuses with tester all checked out ok with key turned to on position -can’t...
  15. M

    No power to dash!! hELP

    Do the heater, radio and signAls use a different circuit?
  16. M

    No power to dash!! hELP

    Thani for the info it is very much appreciated. I removed the ignition and switch and reinstalled per instructions above. Still no power to radio or heater or signals. Truck does start, headlights, taillights and wipers all appear to work properly. Do the heater, radio and sign
  17. M

    No power to dash!! hELP

    Tried adjusting as mentioned above. I lost all contact now as the starter won’t turn even with applying pressure as I had before. I’ll try adjusting more tomorrow and see if I can get contact
  18. M

    No power to dash!! hELP

    A few weeks ago I went to put in a new battery in my 1980 gmc jimmy. Being in a rush I hooked up the cables backwards by mistake and lost all power to vehicle. Since then I have done the following: -Replaced both fusible links at junction block which were fried -replaced fusible links down at...
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