1995 850 T5R No Start, No Spark, No Dashlights

[cudatime71]

I am starting a new thread for my T5R problem since I have changed my thoughts of what my problem may be. I had posted that I had a fuel issue. The car died and sat for many months. I installed a new battery. The engine cranks, but no start. I had no sound coming from the fuel pump and I had jumped the relay, so I bought a new fuel pump and installed it. Still no start. I realized that I had no spark coming from the coil and I noticed that I had no lights at all on the dash. Also, no flashing red light on the dash for the immobilizer. Since the car was new, I had a loose key, so I ordered a new ignition switch and installed it. Still no start. I did the lock/unlock the doors several times and now I have the red light back on the dash when the car is locked. So I don't think it's an immobilizer issue. I checked every fuse in the fuse box under the hood. The radio fuse was shot so I replaced it. I just replaced the camshaft sensor, which was very corroded at the plug, and still NO start. I did clean the connections very good.

So, my current situation is, I have no warning lights of any kind that come on when I turn the key. The dash is dark. I still don't hear the fuel pump kicking on and there is still no spark at the coil. Some of the posts I have read suggest that I may need to change my ecu. Any other suggestions before I just throw some more money at this thing? What is the best way to try and determine if it is the ecu for sure?

Quick recap: Just replaced... battery, ignition switch, fuel pump and camshaft sensor.

Thank you very much in advance!

[rmmagow]

I've not heard of an ECU failure like this unless it got hit with a spike of some sort. Any chance a battery jumper got hooked up backwards? The did blow the ECU on my sister's Capri. You could try removing it, cleaning the contacts, re-insert, remove, re-insert a few times to clean connections. Have you checked you main fuses, the 60Ampish ones that fuse the whole car? Still sounds like a cam or crankshaft sensor. Check the cap and rotor carefully too. With no dash lights though, I don't think you'll make progress until that is fixed. The ignition switch electrical part may be bad.

[BEJinFbk]

Logical, step by step troubleshooting is the solution.
You need to start at the power source and move through
the system in small, easy to confirm segments, one at a time.
Just jumping around from place to place will make you crazy.

Get a meter and a set of wiring diagrams. If you aren't
comfortable with automotive electrical, you may have
to find someone that is to help you out. Pizza and Beer!