99 suburban starts OK but then dash guages go haywire, cuts off soon after starting. Checked Battery, 300 Amps, charged all night but same problem. Started off once in a while now worse. Cant find a short, Alt checks out per Advance Auto test, hate electrical problmes ! Thanks
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This sounds like a low voltage problem, so yes check the charging system first. At 1500 RPM with all the accessories turned on AC blower set to highest speed and headlights to high beam you should have at least 13.4 volts at the battery.
Dead cell in battery; a battery with a dead cell won't accept a charge from the alternator
Bad alternator; if the car will run on it's own without stalling, the alternator is probably still good; if the car stalls you may have alternator problems
Bad starter; (assuming you've ruled out alternator problems) a bad starter will start when the car is cold; once warm, it requires more power to engage than the battery has therefore, it needs a jump start
I'd advise bringing the car to a shop (most autoparts chains will do a free electrical system check) and have the electrical system checked.
You need to Check the Belts for Tightness and replace the Battery Cables. When you Replace the Cables, you will need to Grind the Area where the Cables attach to Make sure that they are Contacting the Area Completely. A wire Brush will work very well for this. If the Belts are worn, they will Stretch out and will not allow the Alternator to charge the Battery. If you need more Help Just let me Know! Please Rate My Response! Thanks!
I have a '99 dodge dakota, 4 cyl, 5 speed manual. While researching a no start problem ran across possible solution to this problem. If no guage lights show when key truned to on position then normally a bad ignition switch. With fully charged battery and working ignition switch guage lights should slight up then go out when ignition in "on" position. Try shaking the key back and forth.