Suburban won't start, my head hurts. - The 1947 - Present Chevrolet & GMC Truck Message Board Network

72kool · 01-13-2018, 03:50 PM

I have a 1993 suburban that won't start.

Month ago, it acted like it had a dead battery for the second time this month. Battery was old so I replaced it.

Fast forward two weeks, it won't start again so I jump started it and drove it 70 miles. On the way home, my wipers turn on by themselves and would not shut off for 20 miles. When this happened , my speedometer and tach both pegged out the entire time. My volt gauge read 9 volts.

After I get home shut it off, it won't start again. No crank

Starter - tested good
Alternator is good
Battery is 1 month old.
Ignition switch new

I tested it for a drain on the battery and found it's on the headlight wire from the junction block but can't follow it further yet.

I tested for power to the starter solenoid and no power from the purple wire coming from the ignition switch. I replaced the switch because cheap part. No change. Tested power from switch and still no power coming from it.

Where to now??? Anybody have any ideas? My next idea was the neutral safety switch but my test light broke before I got there. But I'm still at a loss for everything

RustyBucket · 01-13-2018, 10:33 PM

Long time ago I swapped batteries in on old Accord in the dark and reversed the pos. & neg. cables. It started, ran, & drove, but some electrical accessories were ON when the switches were OFF. Realized what I'd done and corrected the terminals. Only casualty was the TCM. Reminded me when I read your post about your wipers being on.....

**kwmech** · 01-14-2018, 01:39 AM

May have burned out a fusible link down at the starter that feeds the ign switch

72kool · 01-17-2018, 12:54 PM

Back to my battery drain, it's the headlight circuit that is pulling a drain. What in that system would be a likely culprit? Everything functions normal. Is the wipers in that circuit? Would a faulty pulse board module be causing the drain as well as the reason my wipers are wacky?
I pulled the pulse board because it's a common issue on these years, but non of the solder is cracked or messed up and I traced the wipers to the switch and nothing is shorting out.

01-13-2018, 03:50 PM	#1
72kool Registered User Join Date: Dec 2012 Location: kearney nebraska Posts: 613	Suburban won't start, my head hurts. I have a 1993 suburban that won't start. Month ago, it acted like it had a dead battery for the second time this month. Battery was old so I replaced it. Fast forward two weeks, it won't start again so I jump started it and drove it 70 miles. On the way home, my wipers turn on by themselves and would not shut off for 20 miles. When this happened , my speedometer and tach both pegged out the entire time. My volt gauge read 9 volts. After I get home shut it off, it won't start again. No crank Starter - tested good Alternator is good Battery is 1 month old. Ignition switch new I tested it for a drain on the battery and found it's on the headlight wire from the junction block but can't follow it further yet. I tested for power to the starter solenoid and no power from the purple wire coming from the ignition switch. I replaced the switch because cheap part. No change. Tested power from switch and still no power coming from it. Where to now??? Anybody have any ideas? My next idea was the neutral safety switch but my test light broke before I got there. But I'm still at a loss for everything __________________ 1972 GMC C20 Custom Camper 350/TH350

01-13-2018, 10:33 PM	#2
RustyBucket Registered User Join Date: Jul 2009 Location: Space Coast, Fl. Posts: 1,050	Re: Suburban won't start, my head hurts. Long time ago I swapped batteries in on old Accord in the dark and reversed the pos. & neg. cables. It started, ran, & drove, but some electrical accessories were ON when the switches were OFF. Realized what I'd done and corrected the terminals. Only casualty was the TCM. Reminded me when I read your post about your wipers being on..... __________________ Dad always said, "Son, WISH IN ONE HAND, and ......." -------------------------------------- -------------------------------------- Current toy trucks: '71 GMC 1500 SUPER CUSTOM short/step, orig. dk. blue, 350/700r, ps,pb, A/C '72 Blazer 2wd, ochre & white, 454, tremecTKO 500 5spd. ps, pb, A/C, tilt Last 10yrs of hobby vehicles, had a FEW more in the 50yrs. before these: '66 Plymouth Belvedere City of Miami cop car clone. '70 Nova 406"sb, 13.5-1, solid roller, Brodix, p.glide/t.brake, back halved, 9" Ford, spool 4.88, cage,ladder bar/coilover, 10.5 tire....... SOLD!! '67 C10 short/step side mount spare -- SOLD!! '72 Jimmy 2wd, 350/350, ps, pb, fun driver, lots of bondo & a shiny red paint job..... SOLD!! '69 Nova 350, 4spd, A/C, ps, p.b, ...SOLD!!

01-14-2018, 01:39 AM	#3
kwmech Senior Member Join Date: Mar 2003 Location: Colfax-California Posts: 8,388	Re: Suburban won't start, my head hurts. May have burned out a fusible link down at the starter that feeds the ign switch

01-17-2018, 12:54 PM	#4
72kool Registered User Join Date: Dec 2012 Location: kearney nebraska Posts: 613	Re: Suburban won't start, my head hurts. Back to my battery drain, it's the headlight circuit that is pulling a drain. What in that system would be a likely culprit? Everything functions normal. Is the wipers in that circuit? Would a faulty pulse board module be causing the drain as well as the reason my wipers are wacky? I pulled the pulse board because it's a common issue on these years, but non of the solder is cracked or messed up and I traced the wipers to the switch and nothing is shorting out. __________________ 1972 GMC C20 Custom Camper 350/TH350



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