1999 chevy express electrical problems (vehicle, electric windows, windshield, van)

[treeves84]

I have a 1999 Chevy express 1500 recently started haveing electrical problems. When vehicle is off it is pulling 9.10 amps and is not the alternator any ideas where else i could check

[rattle axis]

I'd look at a light staying on, such as a visor light, or glovebox light. -Or, any aftermarket accessories added to the vehicle. (if this is per chance a conversion van, there will be a LOT of that!)
Otherwise, with your ammeter hooked up to measure parasitic amperage draw, you can pull fuses one by one to identify the circuit the offending draw is located on. Just make sure to trip your door jamb switch if you're working with the instrument panel fuse box (and have vehicle door open for access) so you don't have all your courtesy lights illuminated thus rendering this diagnostic technique pointless.

[troymclure]

I think 9 amps is too much to be a glovebox or visor light. That much current is along the lines of what a headlamp would draw.

I do agree that pulling fuses is a good way to isolate the problem.

[rattle axis]

Originally Posted by troymclure

I think 9 amps is too much to be a glovebox or visor light. That much current is along the lines of what a headlamp would draw.

I do agree that pulling fuses is a good way to isolate the problem.

A headlamp would draw above 9 amps. Consider the fact that the headlamp circuit is protected by a 40 amp fuse usually, while the courtesy lamp circuit fuse is 15 amps, maybe 20.

OP, keep in mind you will have a certain amount of parasitic KAM draw, mainly your radio clock, but that will only be about 30mA.

TYPICAL ACCESSORY CURRENT DRAW (AMPS)

Lights Headlights (high beam)10-22 Headlights (low beam)40 Tail Lights8Safety Emergency brake light4 Emergency flasher15 Turn signals10-15 Windshield wipers6-20 Horn15 Brake lights15-20 Running lights8Ignition Winter starting225-500 Summer starting100-400 Approx. Avg.300Courtesy Cigarette lighter15-20 Interior lights10-15 Instrument panel lights4Entertainment Radio10 Stereo Tape10 Electric antenna20Comfort Air conditioner10 Heater20-30 Defroster15-30 Electric seat20 Electric windows20-30

[99chevyexpressGLADIATORva]

I have a 99 chevy Gladiator van that leaks water in the rear windows when it rains i checked everywhere but can't find the source of the leak PLEASE HELP