97 Cranks, Won't Start. ECM Problem?
nspbravada
11-28-2005, 10:28 AM
It began as an intermittent problem, but became permanent over the course of a week. It cranks but won't start. None of the idiot lights come on, nor do instruments. Fuel pump doesn't prime, Turn signals don't work with ignition on either. I've pulled and inspected all fueses. I replaced the ignition switch, thinking that was the problem but no luck.
I'm now thinking the ECM or the Ignition tumbler. Any help would be great!
I've posted this in the 'Blazer Forum' as well as there are a lot more Blazers out there than Bravadas and most of the parts are interchangable.
I'm now thinking the ECM or the Ignition tumbler. Any help would be great!
I've posted this in the 'Blazer Forum' as well as there are a lot more Blazers out there than Bravadas and most of the parts are interchangable.
Chris Stewart
11-28-2005, 07:09 PM
Do the headlights come on? The underhood light?
Let's start at the battery, clean the battery connections. The negative cable has 2 little negative wires coming off it, follow them to their ground points and clean those also. I'll get the book out and do some reading on the wiring.
If you don't have lights but do have some jumper cables, connect the negative post (not the positive post!!!!!) on the battery then with the other end, ground the engine, frame or brackets to make a good ground.
Let's start at the battery, clean the battery connections. The negative cable has 2 little negative wires coming off it, follow them to their ground points and clean those also. I'll get the book out and do some reading on the wiring.
If you don't have lights but do have some jumper cables, connect the negative post (not the positive post!!!!!) on the battery then with the other end, ground the engine, frame or brackets to make a good ground.
nspbravada
11-29-2005, 10:10 AM
Do the headlights come on? The underhood light?
Let's start at the battery, clean the battery connections. The negative cable has 2 little negative wires coming off it, follow them to their ground points and clean those also. I'll get the book out and do some reading on the wiring.
If you don't have lights but do have some jumper cables, connect the negative post (not the positive post!!!!!) on the battery then with the other end, ground the engine, frame or brackets to make a good ground.Chris, I'll check the headlights tonight. The radio and interior lights com on and the chime for the key in the ignition sounds (with the door open). I need to find a set of jumper cables to produce a solid ground, all I have are jump starter units. I'll post my findings tonight. Thanks for the response.
Let's start at the battery, clean the battery connections. The negative cable has 2 little negative wires coming off it, follow them to their ground points and clean those also. I'll get the book out and do some reading on the wiring.
If you don't have lights but do have some jumper cables, connect the negative post (not the positive post!!!!!) on the battery then with the other end, ground the engine, frame or brackets to make a good ground.Chris, I'll check the headlights tonight. The radio and interior lights com on and the chime for the key in the ignition sounds (with the door open). I need to find a set of jumper cables to produce a solid ground, all I have are jump starter units. I'll post my findings tonight. Thanks for the response.
nspbravada
11-29-2005, 10:23 PM
Do the headlights come on? The underhood light?
Let's start at the battery, clean the battery connections. The negative cable has 2 little negative wires coming off it, follow them to their ground points and clean those also. I'll get the book out and do some reading on the wiring.
If you don't have lights but do have some jumper cables, connect the negative post (not the positive post!!!!!) on the battery then with the other end, ground the engine, frame or brackets to make a good ground.Okay, The headlights do come on when switched on, but not the DRLs when the key is turned on (but I don't think they are supposed to). The underhood light does not work.
Let's start at the battery, clean the battery connections. The negative cable has 2 little negative wires coming off it, follow them to their ground points and clean those also. I'll get the book out and do some reading on the wiring.
If you don't have lights but do have some jumper cables, connect the negative post (not the positive post!!!!!) on the battery then with the other end, ground the engine, frame or brackets to make a good ground.Okay, The headlights do come on when switched on, but not the DRLs when the key is turned on (but I don't think they are supposed to). The underhood light does not work.
Chris Stewart
11-30-2005, 05:49 PM
Recheck fuse #4 then check the voltage from either socket to a good ground, if no voltage, recheck the pink wire coming from your ignition switch, it powers everything you say that's not working.
nspbravada
12-01-2005, 10:20 AM
Recheck fuse #4 then check the voltage from either socket to a good ground, if no voltage, recheck the pink wire coming from your ignition switch, it powers everything you say that's not working.Your're the man! No voltage at #4 so I wiggled the pink wire and the fuel pump spun up. Wow, a brand new, out of the box ignition switch and it's bad. Much appreciated Chris!
Chris Stewart
12-01-2005, 05:08 PM
Coool! Even an old blind hog will get lucky and find an acorn every now and then. :cheers:
blazee
12-02-2005, 04:56 AM
Nice Job, Chris. :thumbsup:
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