4age Silvertop wiring issue Options

[lagos]

I've been helping blackscarlet get her swap running at it seems we ran into a wiring related issue and the car will not start. The harness was original done by DrTweak many years ago but the swap was never completed and the car sat for a while. Maybe a few 4age gurus on here can point us in the right direction.

Here are the issues.
1. the car will not crank
2. the srs warning light is behaving oddly and staying on even after the key is out of the ignition.

I feel like there is a grounding issue going on here. On the 3sgte there is normally a ground wire from the main harness to the back of the intake manifold that provides a ground for the injectors and a few other things in the EFI circuit. I had blacscarlet take a look under the car but she couldn't find any grounding wires on the back of the 4age intake manifold ... is it located elsewhere or handled differently on this engine? I don't have a proper wiring diagram for this motor, just the ones for the car.

The cranking issue could be caused by an alarm that is installed. Figuring this, I bypassed the starter relay and supplied my own 12v to engage the starter. The engine cranked without problems but would not fire.
Next I tested to see if we had spark, and it seems that we do not.
I went on to test the injector harness clips for power, and they did indeed have it, along with the main power wire that feeds power to the coil.

I still feel like this is a grounding issue due to the odd srs behavior, or in the worst case, a problem with the wiring harness conversion.

Anyone got an idea as to what could be going on?

[lagos]

I had a few small wiring issues in the relay box. I do have spark now. The SRS light is also off now. I checked the voltage on almost every harness plug and everything is getting power. I believe the issue is my fuel pump which i will be replacing this weekend. I am unable to hear the pump running at all and the car has been sitting for almost a decade. Thanks for the responses and I'll let you know if the fuel pump was the only issue this weekend.

PS I do have the 201 4 runner igniter as well.

Sounds good! Also, if you fuel pump does not turn on while cranking, check your circuit opening relay under the dash next to your ECU.

The pump is not coming on with b+ and fp jumpered, yet there is power at the fuel pump harness plug... So the current diagnosis leads to a bad fuel pump that died from the car sitting for a long time. I will verify the COR after we are able to actually start the car to make sure it can also start without bridging the diagnostic box.

The rest of the issues appear to be from EA1 not being fully secured into place, causing all kinds of electrical oddness with lack of spark and srs warning light going crazy. So, so far the harness appears to be in good shape. We will keep this thread updated once the new pump arrives!

This post has been edited by lagos: Jun 5, 2012 - 10:24 AM