[395xp]

Hello New to this forum looking for input .
I have 7.3 that has a no crank issue ive ruled out ignition switch and fuses and relays. And starter and replaced the the neutral safety switch to no avail , for the time being ive wired a push button switch and connected to the starter wire and can run my truck this way. Thanks for any input

 

[Hydro]

You have the big start solenoid that mounts on the passenger fender?

 

[395xp]

Not in the 2002

 

[Hydro]

Not in the 2002

So then you have a late '02 model, that is why I asked
your start relay is in the fuse box

so now, we have to devine if it is an auto or a stick

Do you have 12 volts on terminal 30 of the start relay?

 

[395xp]

Yes and it does gets power when ignition turned to start

 

[Hydro]

Yes and it does gets power when ignition turned to start

On terminal 86?
term 85 is the ground supplied from the pcm

term 30 (B+) to term 87(starter) should make the starter run

 

[395xp]

I have to pin those yet I went past the relay once I felt and heard click

 

[Hydro]

May be clicking but the internals are burned --swap it out for one of the other relays
if it clicks, then the safety circuits are fine

 

[395xp]

I replaced it with one of its neighbors , no difference ,

 

[Hydro]

Can you confirm that jumping from term 30 to term 87 will crank the engine?
or that the relay is indeed clicking when the key is in the start position?

 

[395xp]

I removed all the other relays and held on to the starter relay and it does click.

 

[Hydro]

the wire from term 87 goes to the starter
hmm, there is the big connector on the rear of the engine, maybe check there
stick a jumper wire into the relay socket -- do you know which terminal is 30 and 87?
if not there are plenty of diagrams on google - Bosch mini relay
lets get past this will it crank or not question

 

[395xp]

I pulled the wire and it does crank. ive wired a relay and push button starter button to it and I am using the truck that way currently. I'll down load a diagram and start checking wire continuity from there .

 

[Hydro]

Just trying to determine if you have a power side problem or a signal side problem
jumping the terminals at the relay will eliminate the question of the power side

 

[395xp]

I'll work that tomorrow.. thank you for replying ill post back here once have test results .. just to confirm I've replaced ignition switch , fuses , neutral safety switch and swapped relays. And tested for crank , which it does

 

[Hydro]

I would have started with the jump wire under the hood to prove the starter, then moved to the start relay using a meter or test light to figure if the relay was getting proper signals and power
cheap and quick tests

 

[395xp]

I didnt mind spending a few bucks all original parts 490 k truck milage