[TxGreaseMonkey]

For starting problems, the K-Test is usually sufficient to test the ECM.

[joecrx]

Hi
I did the k-test I'm reading 4.9volts.wen I remove the connecter and try to stars it starts but for 2sec and go s off and check engine light stays on

[TxGreaseMonkey]

If the Check Engine Light doesn't go out, then the problem is with the ACG (ALT) fuse, main relay, or ignition switch. Since the K-Test showed 4.9 volts, the ECM should be okay. Ensure the main ECM ground on the thermostat housing is clean (no oxidation).

I suspect your ignition switch may be bad.

[joecrx]

Hi
Wer is the ACG (ALT) fuse

[TxGreaseMonkey]

Under-dash fuse box. It may be fuse no. 12 or 24. Easiest thing is to check ALL under-dash fuses with a test light or multimeter, then you don't need to even know its exact location.

https://www.askmehelpdesk.com/cars-t...tml#post251124

[joecrx]

OK ill do that rite away
Thanks

[joecrx]

I checked it.its fuse 12 I'm reading batt voltage.
The ignition swich is new I think I have a short some wer what ill do ill disconnect all the connecters on the fuse box under the dash and lieve the 1s for the main relay and ignition switch so I can start the car and test it for 2days and see what happens
What do you think?

[TxGreaseMonkey]

Is fuse No. 12 bad?

Here's how to properly and quickly test fuses:

https://www.askmehelpdesk.com/cars-t...tml#post252145

[joecrx]

No its good I'm reading 12volts

[TxGreaseMonkey]

Stay with it.

[joecrx]

OK
Ill do Main Relay Harness Tests

[joecrx]

Hi txgreasemonkey
I did harness tests
1. OK
2. 12.3volt
3. 12.2volt
4. 9.3volt
But got stuck with the 5th test I can't tell wich 1 is connector "A"

[TxGreaseMonkey]

It's the connector on the left, with 26 pins, as you look at the connectors.

[joecrx]

The test was OK
Still the same but thanks for the help it was useful and professional