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  1. J

    Drilling Holes in a Plastic Gauge Cluster Crystal?

    There are special drill bits used to drill plastic that prevent cracking and blow out. They are used to install aircraft windows.
  2. J

    ECM1 Fuse Schematic 89 Suburban

    My 89 Suburban will occasionally blow the 10 amp ECM 1 fuse. It’s done it twice, both times after I got off the brake. Anyone have a wiring diagram for the ECM 1 fuse circuit? I need to start tracing wires. I think they are pink and pink with black marker but don’t know what the fuse powers.
  3. J

    Windshield Wiper Motor Upgrade

    yes it is but I learned from my RV days that stray grounds of bad grounds can play havoc, so I kept on digging. Believe it or not, this situation with the courtesy lights was causing power to switch and bleed down the jamb switch line which is a ground side of the bulb, but did not blow a fuse...
  4. J

    Windshield Wiper Motor Upgrade

    Photo
  5. J

    Windshield Wiper Motor Upgrade

    Ok, folks. This is the resolution to the pulse issue. It’s not the board. So, I was completely redoing all my switches on the courtesy lights because they were intermittent and acted like there was a stray ground somewhere. I found a wire testing Tool in the dash hooked to a ground wire. It...
  6. J

    Windshield Wiper Motor Upgrade

    The pulse board is in the lower steering column on mine. I have RPO CD4. Pulse wipers. Leroy
  7. J

    Windshield Wiper Motor Upgrade

    Well. Everything on that turn signal stalk works ——cruise, Wiper low , Wiper high, washer pump, mist, turn signals—except Wiper delay. So it’s either the switch or the board. Both are new. I don’t have enough knowledge to know how to test the board so I guess it will stay this way until I find...
  8. J

    Windshield Wiper Motor Upgrade

    Thank you. This is what I suspected would happen and will try it this weekend. Without a schematic it probably isn’t gonna be easy. My suspicion is the board is bad even though it’s new but who knows at this point. Not certain how to test the delay circuits. I presume the delay circuits are...
  9. J

    Windshield Wiper Motor Upgrade

    Thank you. The C type just looks like a big fat C. I’ll try to post a photo of it and my application.
  10. J

    Windshield Wiper Motor Upgrade

    I am making baby steps but it’s headway. The later style motor will not plug to my application as you state. However, it appears there are models that will but that’s another thread for another day. My pulse board is PN 15597496 I believe. From what I can find, which isn’t much, this pulse...
  11. J

    Windshield Wiper Motor Upgrade

    I am going to look into whether they will connect together this weekend. I’ll look at the motor electrical connections too and see if they match up to a later year. No one has been able to determine why this oddball system doesn’t work including myself. Thanks.
  12. J

    Windshield Wiper Motor Upgrade

    I may be wrong on the year at 91 but my set up does not have the pulse board on/in the motor face. The pulse board is impossible to find as well. I just read somewhere that a later model motor with the pulse board (C type) set up is a plug and play. Every part in my wiper system is new and the...
  13. J

    Windshield Wiper Motor Upgrade

    I have a 89 GMC Suburban with the old style wiper motor, With delay and tilt which has a credit card sized control module mounted at the bottom of the steering column. All wiper system parts are new but the wiper delay function will not work. I read in an old thread somewhere that installing...
  14. J

    SORRY MECHANIC

    I have to post this. I have been chasing a weird over heating problem for two months.89 Suburban TBI water temperature would climb to or greater than 230. Shut the engine off for 15-20 seconds and it would run around 205-210. It might run 10 minutes at that temperature or 1000 miles. New...
  15. J

    Front End Noise

    Photo
  16. J

    Front End Noise

    Photo
  17. J

    Front End Noise

    Thanks for the input. I found the issue. The upper mount bolt for the left front shock was not totally tight allowing the shoulder to slide slightly sideways when hitting a bump. The result was it bumping against the frame. A couple turns and no noise now. I am a dinasour of sorts now at 77...
  18. J

    Front End Noise

    Aries. I got them off the net from Carid. Direct fit except rear mount needed minor mod.
  19. J

    Front End Noise

    Thanks, I have checked that as this noise or bump happens as the tire is elevated or bounces over a bump, crack or even a paint line on the highway. Strange. I am going to jack it up this weekend and check it again.
  20. J

    Front End Noise

    Rear only!
  21. J

    Front End Noise

    No
  22. J

    Front End Noise

    I am about to go mad trying to find a front end noise. It sounds like a golf ball in a cardboard box when running over bumps or cracks in a road. Left side. Applying brakes doesn’t change anything. Steering changes no difference. Everything is new up front, bushings, ball joints, steering Box...

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