2001 GMC Sierra

Tiny
CBASSO
  • MEMBER
  • 2001 GMC SIERRA
2001 GMC Sierra V8 Four Wheel Drive Automatic

Hey guys, new to the forum, got a problem with my 2001 GMC Seirra 1500 SL. The unit was killing the battery after two days of not driving, performed a draw test using a test light, found a minifuse under the hood that stopped the draw when pulled. It was a 15 amp fuse labeled RADIO. When I started the unit up with no fuse the tach, speedo, odometer, fuel gauge, message center and radio do not work. The fuel gauge has been sensing erratically, I was told this is a normal problem as the contacts get gummed up. Also the radio clock had been jumping around when I shut the truck down (not always back to 12:00), so I disconnected the radio completely, still drawing amps when not running, so that should eliminate the radio from being the source of the draw. Just wondering if anyone has any ideas on how to find this draw in that circuit. Im not to well versed in electrical diagnosis, but willing to try it out. Thank you for your time.
Tuesday, September 29th, 2009 AT 12:25 PM

2 Replies

Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
Place an AMP meter is series with battery positive measure amp draw..5milli amps is allowed any higher problem. Your going about it right the meter will give a numerical value and help pinpoint fault. Did drain go away with radio out?
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Tuesday, September 29th, 2009 AT 12:39 PM
Tiny
CBASSO
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I tried the amp meter in series twice (different multimeters), unfortunately I could not get a solid reading, alot of fluctuating and inaccurate readings. This why I resorted to a test light, I am aware that there will be constant draw of roughly.5milliamps. The drain did not go away with the radio "unplugged". Thanks again.
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Tuesday, September 29th, 2009 AT 2:07 PM

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