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 Post subject: Security light on and overhead console is crazy!
PostPosted: Mon Sep 11, 2017 11:18 pm 
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I am merely driving my van
I am merely driving my van

Joined: Sat Sep 09, 2017 7:38 pm
Posts: 4
Location: East Tennessee
I bought this 99 Astro LS on Saturday and have discovered a couple issues.
First is the Security light is on and stays on all the time but the van runs normally.
Secondly the overhead console info center is bonkers. The compass just changes direction ocassionally by it'self even if you don't change directions. The Temperature sometimes freezes and will not change with the outside temperature (usually just shows the temperature at last startup) The trip info is all over the place, the average economy will jump around and the instant economy hardly changes from 6mpg. The gallons used will be different every time you start the van and may only change .1 or .2 gallons when the gas gauge goes down a full quarter tank.
I hooked up my OBD reader and opened the app on my phone that shows everything that the overhead console shows except the compass and temperature, according to it the mpg instant and average show like it should.

I noticed on the wiring diagram that the overhead console and the security system are tied into the same communication wire going to the ECM.

Does anyone have a clue to what may be going on, I have it narrowed to either a bad wire connection, bad ECM or bad overhead console electronics.

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Cancer's a Bitch, live each day like it's your last chance to enjoy life.


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 Post subject: Re: Security light on and overhead console is crazy!
PostPosted: Thu Sep 14, 2017 6:09 pm 
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I sleep in my van

Joined: Wed Feb 01, 2012 8:10 pm
Posts: 386
Location: southeastern ct
Yikes! Ya sorry but I've got nothing to offer in the way of advice on this one. It sounds like your heading in the right direction so good luck. When you find it you can post the cure and we will all have learned something new

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Captn. Crunch
"I don't beat my rig-I use it to it's maximum potential"
1994 Safari conversion (sold) and miss'n it!
1999 Safari SLE AWD
np236 transfer case
Torsen rear w/3.73's
2" body lift
S-10 rear leafs
Corvette servo

Coming soon
Torsen limited slip cast iron front diff
Skid plates
Rock rails

Coming later
5.7 vortec V-8


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