no start issue

[enola5930]

So this is my first time posting. I have a 99 ranger 2.5 liter that wont start.i have key in run and there is no power to the coils or fuel pump and no check engine light comes on at all. Also the number 13 fuse has no power on either side and airbag light is flashing slow

 

[RonD]

First, remove both battery cables and clean terminals and cable ends.
A poor battery ground will cause odd electrical issues.

Reinstall and check power again.

There is one relay that supplies power to the coils, fuel pump relay, injectors and computer, plus a few other things.
The EEC relay, it will be in the engine compartment fuse box.
When you turn the key to RUN the EEC relay should click closed and send power to those systems, fuel pump relay(right next to EEC relay) should also click if EEC relay does.
It could be labelled ECM, PCM, or "bob's your uncle", they seem to change the label on this relay ever 6 months since 1985.

The EEC relay and Fuel pump relay and I think the WOT(wide open throttle) relay all have the same part number, so if you do not get a click from the EEC relay when key is turned on then pull out EEC relay and put Fuel Pump relay in that location and try key again, if you get a click then replace EEC relay, if still no click then could be ignition switch(under steering column) or wiring under Fuse box.

 

[enola5930]

when i turn ignition on i hear one relay click but ill check it out and get back to u. thanks for the reply

 

[RonD]

When EEC relay closes it passes power from a 30amp fuse to the computer, coils and the rest.
If computer has no power then no CEL will come on and then go off when key is turned on, and there would be no power at the coil or at the fuel pump relay.
That's what I am basing my suggestion of the problem on.

'95-'99 Ranger 2.5l have a slightly different setup.
There is a 25amp fuse in the engine fuse box (listed as fuse #19 in my diagram) this fuse gets power from the key in RUN position, that power activates the EEC relay but also powers both coils directly, so in these models the coil power isn't thru the EEC relay, it is directly powered from the 25amp fuse.
So no 12v power at the coil with key on could mean 25amp fuse is bad, or ignition switch is not sending power to the 25amp fuse

 

[enola5930]

i hat them have battery power at my pump relay and pcm relay but no power to cut them on

 

[enola5930]

truck is now fixed after pulling the fuse panel i found that one of the terminals on the fuse that powers the pcm diode under the hood had came out of the back of the fuse panel