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Service AWD light

ANYTHING TO DO WITH MAKING YOUR VAN MOVE EXCEPT FOR THE ENGINE ITSELF.

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astrojohn
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How many wheels are on an Astro van? (4): 4

Service AWD light

Post by astrojohn » Sun Oct 21, 2012 12:44 pm

The Service AWD light comes on in my 2000 Astro, at weird times. For days I can drive it, and then when I'm doing errands, stopping and starting the van, it will come on. The next time I shut it off, and re start it, the light is off.
There is a relay or something, behind the dash, that I can hear click. When it clicks once, the light won't come on, but when it clicks 3 times, the light comes on.
I've read about checking the connections for dirt or corrosion, and I've done that. It still happens. I'm not sure if the AWD works, when the light comes on, but winter is coming, and if I have to replace the shift motor in the transfer case, I'd like to do it before it snows.
The cost is making me hesitant about just going out and replacing it. I wil, if I'm sure that is the culprit, instead of maybe it being the relay, or whatever is making the clicking behind the dash.
Any ideas?

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H2OJoe
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How many wheels are on an Astro van? (4): 4
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Re: Service AWD light

Post by H2OJoe » Sun Oct 21, 2012 3:13 pm

Though this might not be your problem, my old transfer case had a slight leak and when the fluid got low the light would come on. Check your fluid level.
FYI, last winter I had the encoder motor in my transfer case replaced by Aamco in Salt Lake City at a cost of $1700. Turns out there was other things wrong that they didn't diagnose. After returning to Oregon (less than a month later) I ended up replacing it with a used transfer case. Used transfer case and labor from my mechanic was only $600. Point is, that unless you are capable of tearing it apart and making the repairs yourself, it's probably cheaper to buy a used transfer case than have someone repair yours.

Good luck. :guitar:
2001 Astro LT AWD "Redneck Edition", 4" Custom Lift, 30x9.5R15LT on stock wheels, Hightop conversion, custom interior, custom roof racks, external solar shower, front recovery points

astrojohn
I am smitten with my van
Posts: 38
Joined: Sat Oct 08, 2011 10:57 pm
antispam: No
How many wheels are on an Astro van? (4): 4

Re: Service AWD light

Post by astrojohn » Sun Oct 21, 2012 8:23 pm

When I took possession this summer, I did change the transfer case oil, with the blue stuff. The old oil wasn't bad, but I wanted to change it. the transfer case was full, and there are no leaks.
As for my mechanical ability, I'm sure I can handle almost anything, except a transmission overhaul.

LiftedAWDAstro
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How many wheels are on an Astro van? (4): 6
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Re: Service AWD light

Post by LiftedAWDAstro » Sun Oct 21, 2012 11:20 pm

When the light is on, you need to scan for codes. A basic parts store code reader won't see the correct codes. You really need to get a dealership level scanner. For the cost of doing that, I would be looking at just buying a new shift motor. If all else fails you will always have a spare for when/if it does fail.
Current rides:
2013 Toyota Tundra DC 4x4
2008 Dodge Nitro 4x4
2005 Nissan Sentra 1.8S Special Edition

Mileage spreadsheet

Vans owned:
1986 Safari 2.5L 4 speed manual - scrapped
1995 Astro 2WD conversion 4.11 posi, shift kit, DHC rock rails - sold to Skippy
1998 Astro 4x4 D44, D60, NP231, full hydraulic system with 9k# Milemarker winch and snow plow - sold to Lockdoc
2003 Astro AWD all stock - traded for a 3/4 ton truck
2005 AWD, 4.10's - sold to skippy

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