Alarm spider / alarm help

[FIVESPDDISCO]

Pt
Etm ?

 

[Lake_Bueller]

QUOTE=FIVESPDDISCO]Pt
Etm ?[/QUOTE]

Electrical
Troubleshooting
Manual

It's part of the RAVE disc.

Now if only I could understand the wiring "diagram" in that damn ETM:banghead:

Quick update also....I sprayed some cleaner on the alarm unit. Replugged and the flashers started going on their own. Then the CE light came on again. But now I don't have fuel pressure. And the key door locks don't work. Sure is beginning to sound like the source of my problems.

Oh yeah...thank PT (I think).

 

[FIVESPDDISCO]

Thanks
Give em a few days with the wiring.

I may have a 97 alarm computer for you.

 

[Lake_Bueller]

Thanks Justin!

I'm done for tonight but will dig a little deeper into the wiring diagram tomorrow night. If a bypass is not possible, I'll be looking for an alarm computer. And this time, I'll waterproof the SOB (along with the ECM!!)

 

[Lake_Bueller]

More results (or lack there of) from last night...

Jumped the two black/orange wires.
Fuel pump and starter work.
Power to ignition coils.
Still no spark!!!

I'm getting ready to pull it to the street and light a match:banghead:

Just kidding on the match thing

 

[ptschram]

From the lr4x4 thread...

"Take a digital voltmeter (DVM) and check if the fuel solenoid (Tdi) or ignition coil/fuel pump (V8) has a 12 volt supply to it by connecting the meter to the relevant blade connector and earth and turning the key to position 1 (on). If there is a 12 volt supply to the circuit, then the fault probably lies elsewhere. (Note that a dry joint may not always provide a perfect break in the circuit; on my own vehicle, it caused a voltage drop at the coil which was only apparent once you started cranking. As a result all appeared OK at rest, but when you tried to crank there was no spark. As I "knew" there was power to the coil, I didn't look at this any further, so it took rather a long time to find out that the power consumption when cranking was causing a voltage drop at the coil, which in turn caused the ignition amplifier module to cut out). "

This info does not appear to be correct for NAS vehicles. To the best of my knowledge, the spider was not present until '96 at the earliest in NAS trucks. As a result, the comments above relating to an ignition amplifier are incorrect as a GEMS truck doesn't have one.

Once again, everything one reads on the internet has to be investigaetd before being relied upon (especially if I post it )

 

[ptschram]

Bueller:
Using your trusty ETM, start looking ofr power at the coil pack, this is gonna require lots of brute-force troubleshooting to fix. Let's stop focusing on the ECU and look at the wiring. There are numerous header junctions that could be corroded, etc. Hell, it could be the corrosion on the ECU and not the ECU itself. Have you removed the two circuit boards from the case and scrubbed the ever-loving piss out of them? Soap and water and a toothbrush are your friends here.