7.3 dead in the water. help

[littleredstroker]

First thing first get the multimeter out and ohm out every pin out from the IDM connector on the harness. OF course 7 will show dead but that wire is the one I would be most concerned with in the harness. It is fully possible for it to have shorted out the IDM and have done no damage to the wiring harness. In fact that is typically how electrical systems are made as it prevents fires. The thing that should take the most power is the the wiring so everything else should burn out first to prevent a wire related fire.

Carefully visually inspect the connector and harness where you can see it. IF the ohm out is good and the wire looks good it should be fine. Replace the IDM and injector solenoid and plug it all back in and see how it does. Obviously check the number 7 OHM out with the new good injector solenoid in place to confirm that circuit.

Saying the idm was a big expensive fuse ?

sent while looking at a hole in my block

 

[7.3 Whitey]

In basic terms, a high voltage dual relay. Uses high voltage to fire injectors, sends a low voltage back to the computer to flag the completed/incomplete action

 

[907DAVE]

Saying the idm was a big expensive fuse ?

sent while looking at a hole in my block

Basically all computers are....lol.

 

[7.3 Whitey]

No. Computers are commanded by 1 and 0. Relays. A zero here means a 1 here and zero there. That's eighties stuff. New computers have a million 1s and 0s for every 1/0

 

[907DAVE]

And your point is?

 

[7.3 Whitey]

They're complicated relays...

 

[Charles]

They're complicated relays...

Usually the most important aspect of a relay is it's ability to "relay..." low amperage signaling to a high amperage switch so that a large load can be switched from a practically sized control unit, and so that controls can be located remotely without spending a fortune in heavy gauge wire all over the place.

Another use would be for isolation, since the two circuits are not electrically common as they would be with some other switching schemes.

The computer is generally for the purpose of .... computing.... Processing inputs and altering outputs accordingly.

 

[907DAVE]

The point that Tarm was trying to make was that the internal circuitry of the IDM may be less "robust" when compared to the external wiring.

I am not arguing the fact the IDM is not actually a computer, but it does have a printed circuit board just like a computer.