1995 Chevy Astro Chevy Astro Weird Electical Problem

Tiny
_BRAD_
  • MEMBER
  • 1995 CHEVROLET ASTRO
  • 6 CYL
  • AWD
  • AUTOMATIC
  • 200,000 MILES
I will make this as quick as possible. 1995 Chevy Astro, no power to fuel pump. If I jump the relay I get power to the pump. Relays are brand new. Also no power to radio, headlights and dome lights when key is turned ON. Also, no check engine light when key is turned ON. Attempted to use a code reader however code reader displays no connection. Unable to perform build in diagnostic since I dont have a check engine light.

I have spark to all cylinders (tested by starting fluid).

I'm thinking the ECM maybe?

Any thoughts?
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Sunday, January 25th, 2009 AT 1:05 PM

5 Replies

Tiny
DGRAY56
  • MEMBER
I have the *exact* same problem. Check fuse block and no power to left bank only, everything else has power. Wiring and connections are perfect/clean. I replaced ECM and Prom. No effect. Van was perfect before this happened. Did you ever find out what the problem was?
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Sunday, October 3rd, 2010 AT 4:15 PM
Tiny
_BRAD_
  • MEMBER
The problem area is the connections under the hood behind the battery. There you will find wires connected to a circuit. Inside that circuit the wires are burnt/not connecting. What I did, was totally bypass that stupid little circuit, and I hard wired all the wires directly to one another by soldering them and then taping them. That connector circuit box is just that; its just a middle connection box between wires. It is totally safe to just bypass the box and connect the wires directly.

The box has a high tendency to short out the terminals inside. You will see what I mean when you take it apart.

Let me know if you need a picture.
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Monday, October 4th, 2010 AT 12:50 AM
Tiny
DGRAY56
  • MEMBER
First off. THANK YOU! I was about to pull the whole dash out to get to the fuse block. I would really appreciate a picture if it isn't too much trouble because behind the battery I have an accessory line to a bolted center terminal and a cluster of wires bundled together with tape plugged into the back of the power block, but before I rip this apart I'd *really* like to make sure I'm working on the what you're describing and not making things worse by pulling apart the wrong thing because I don't see a box where the wires plug in. This darn thing has some things like a 94 and some things like a 96 and some things that are totally different than either. THANK YOU again! BTW, when this all works out and gets fixed I'm going to make a video to put up on utube to help out all the dozens of other frustrated Astro owners that I'm sure have the same problem cropping up in different ways that could use the help. And I definitely want to credit you for coming up with the solutuion!
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Saturday, October 9th, 2010 AT 2:50 AM
Tiny
_BRAD_
  • MEMBER
Hello,

Oh no worries, I will work on getting a picture updated this weekend. And yes, from the sounds of it, you found the correct terminal box I'm referring to. Its got bolted center terminal.

I will get a picture going here this weekend. Bare with me.

Thanks,
Brad
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Saturday, October 9th, 2010 AT 3:21 AM
Tiny
DGRAY56
  • MEMBER
So I ended up pulling out the Fuse Block and checking all the connections. Then I decided to pull the four wire connector that plugs into the main accessory cable that bolts to the back of what I thought was the fuse block which is actually just a front end wiring isolation plate between the engine bay and the inside of the van. I must have pulled that connector off a dozen times and never noticed that one of the leads had actually melted breaking the connection to the "C" lead which powers the dead left bank on the fuse block. I cut that one line and connected it directly to the positive terminal of the battery using the terminal extender (this is a conversion van) and viola! Everything worked. I can't figure why that connection would heat up and melt before the fuse blew other than it was arcing because it wasn't a good connection. The van has 150k mi on it so it must have just eventually worked it's way lose from vibration. I can see how this connector could cause all kinds of weird stuff as different connector terminals intermittenly start to lose solid connection. Thank you again for your help! I'm going to pay it forward by creating a video to put up that explains all the things I've found out about the Astro's electrical quirks to save others from the same grief of tracking down seamingly mysterious symptoms.
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Monday, October 11th, 2010 AT 5:40 PM

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