Question about 1989 GMC Sierra

1 Answer

Electrical short fuse for guages on my 89 gmc sierra s15 truck keeps burning out..when it burns out the air conditioning does not blow cold..when I turn on the lights with the blown fuse or with the fuse taken out my temp gauges pegs out at 260 ...and now my warning buzzer that tells me my lights are on when I pull the key out stays on when I am driving with the lights on at night..cruise control stops working out of the blue as well... only problem noted is that steering colum bolts are loos at the tilt colum portion..have to open it up and tighten down those four bolts..

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  • fastservices May 29, 2009

    will try that..thanks for the help..hope it solves the problem..I actualy thought that mayby a wire was loos in there somehow or getting smashed and grounding out...

  • fastservices May 30, 2009

    well..just finished with the loose bolts..now my steering wheel is snug as ever..even put a new tumbler...headlight dummy buzzer still buzzing when I turn the lights on when I am driving...darnn..just dont know whats going on...pulled the fuse to stop the light buzzer..but the buzzer still buzzes normaly when I put the key in and start to turn the key...guages still shorting out the 20amp fuse..




  • fastservices Jun 05, 2009

    ground was good...since last post..battery died..so put in a new one last thursday...today battery died again..got a jump and tried to drive it home..drove for about 5 miles before it died..figured altinator was bad...pulled altinator and saw a ground wire that connects to the water neck on the manifold came out of its end terminal...got a new terminal and crimped that ****** back on and then tightened it down..put in the new altinator..plugged in its harness and put the two wires back on the single post as it came off..connected ground first and then as soon as I put the positive cable on the altinator arched ...noticed that my engine compartment light did not go on with the battery hooked up...then I jiggled the two wires that connect to the altinator and the altinator arched again..dissconnected the hot and shut the hood..dont know what to do anymore..

  • fastservices Jun 05, 2009

    well I installed the altanator before I even hooked up the battery..when installing and removing the battery..what is the correct order for install and removal of battery cables?

    So what happened is as soon as I touched the hot cable to the battery and started to tighten it down(side posts) I heard a loud spark and saw a flash from the corner of my eye ,,tightened the cable all the way down..and noticed my engine courtesy light was not on...went and touched the two wires that connect to the altinator and saw the altinator spark at the terminal post..quickly disconnected the hot cable and just left the ground on..will try to figure out where that ground cable goes to..will have to open up the harnes..more to follow..you can email me if you want and I can send you pics fastservices@comcast.net

  • fastservices Jun 05, 2009

    Forgot to say "THANK YOU FOR YOUR TIME AND HELP!!"

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  • GMC Master
  • 3,433 Answers

Tighten those four bolts making sure no wires are in the way or damaged where they come out of the cokumn right around the area of the column clap

Posted on May 29, 2009

  • 1 more comment 
  • Ned C Cook
    Ned C Cook May 29, 2009

    Good luck. That may be it. The column is used as a ground also, so if it's loose . it could affect many things.

  • Ned C Cook
    Ned C Cook May 30, 2009

    OK, now check for the engine to body ground usuallt locate at the rear of the engine and screwed to the dire wall. There will be feedback if a grd is poor, like trailer kights do when they are poorly grounded. The other lights come on when you hit the brake or your turn signa flashing will caiuse other lights to flash.. If you have no starting problems, the battery to engine ground is good.. Let mw know please.

  • Ned C Cook
    Ned C Cook Jun 05, 2009

    Always disconnect the batt grnd first and make all your connections before the lastconnection being the frnd. To what is that manidold wire connected at the other end? Is this the battery ground cable?If so, There is the majority of your electrical problems. The positive will arc if anything is on, like the underhood light. What do you mean in saying the Alt is arcing? Two wires at the single post on the alt. Remove the smaller of the two. Connect the bigger of the two. We're working towards the short problem, hang in there. The smaller wire should be an exciter wire on its own little post and hot only when key is on. Please ck this. Replace the burnt fuse, astart the engine and tell me what the voltage is at the bat posts. Should be between 13.6 -14.2 volts. Confirm?

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