Engine will not turn over

My boyfriends 1986 Chev Sonoma s15 has problems starting. It cranks over and eventually starts smells like its flooded. He replaced the fuel injectors and now it is losing fuel what is going on?

My husband was jumping his car with his truck and the positive cable touched the truck. It killed the engine right away. There is power on accessory but it won't turn over. What would be the problem?

Hello,
I am new to the forum and am in dire need of assistance.
My truck is a 98 K2500 standard car 4X4.
I replaced the dash and main wiring harness with a dash and harness from a 97, same model truck.
Every molex plugged directly in. The only difference between the trucks was the 97 had air bags. The yellow (airbags molex) plugs are not plugged in.
Every single thing on my truck works perfectly for the testing, but the truck will not start or even turn over.
Any ideas on what I should check?
The security lights stays on and I tried resetting it, but I have found multiple opinions on how I'm supposed to reset it?
Any help would be greatly appreciated.

James,
Thank you for the quick reply. I'm a custom car builder by trade and I am really stumped on this one.

I purchased the truck used, someone used it as a work truck and the interior was trashed.
The motor and trans were in great shape.

I purchased a new dash for my truck and the wiring harness was integrated into the inner portions of the dash. All of the molex plugs were exactly the same (except for the extra airbag plugs and one black molex), so I went for it. Now the dash is completely in 5 hours+ install time, and the truck will not turn over.
What is really weird is how all of the items on the truck work perfectly, lights ac radio wipers et ect.

I really dont want to tear the new dash out and all apart just to load it with my old harness.

I was able to get the security light to go out by leaving the key on for 15 minutes.
However, the truck will not turn over.

Over the last couple weeks I have some issues getting it started. Mainly when it was really cold. I would turn the key on and have to hold it for a couple secs and turn it on and off a couple times to get the starter to turn over.
Could this be a related problem and coincidentaly gotten worse with the new dash and wiring?

Alright.
I did some testing. I have voltage present on the crank fuse in the fuse panel with the key turned over. I also have voltage on the ignition and ecm fuses with the key turned over.

Per your suggestion, I checked the small red wire at the starter solenoid and do not have voltage when the key is turned over.
I do have constant 12 volts on the larger + positive terminal.

Thanks again for your assistance.

James,
The relay in the fuse block under the hood is not getting power.
Also, I discovered another difference in the two trucks. The one I got the dash from is a manual trans and mine is automatic.

James,
There is a black molex plug in the vicinity where the clutch would be that did not have anything to plug into. It is black plug, with 2 purple wires, 1 purple/white stripe, and 1 brown/white stripe.

Ok,
So the clutch switch wires go directly to the starter relay? The starter relay does have a purple wire on the bottom of it that looks like the coil trigger.

There are two purple wires at the clutch switch molex plug.

So you are suggesting I jumper the purple wires at the clutch switch molex to a 12v ignition wire to act as a trigger?

James,

Ok. On the black molex plug that I assume is for the clutch switch, there are 4) wires. Two purple, one purple/white, one brown/white.

2) wires have 12volts with the key on. I tried jumping each 12v wires to the other side and it would not fire.

Thank you very much for your help.
You were exactly right. Jumping the left side of the molex purple wire (switched 12V) to the purple /white white did enable the truck to start.

I have a new problem. The automatic transmission does not want to shift out of first. It does park neutral drive ect, but does not shift going down the highway.
When it rains, it pours. :)