what that migh be ECM,BCM,alternator

[s426]

Hello every one;
I hope to find a diagnose to this problem I have, I have Buick 97 custom,
2 days ago while I’m driving the instrument panel lights up almost the engine stopped for 2-3 seconds then I heard the computer BCM clicking at same time,
Then it went back normal.
Then after 30 minutes of driving it completely stopped, and all dash board were lit,
I put back on park. I start it, it starts fine.
The day after/
I thought it could be a fuel pump, so I took off cap<pressure> go the gas line, then I pressed it to see if there is pressure. It is only when it’s running idling.
But when I got back after 5 minutes the car was not running and dashboard light came on
But the o’clock was on the correct time display
I went to work 20 miles driving was fine.
Tonight at work I let run but I sat inside. After 5 minutes it shuts off but all dashboard lights did not come on for 3 second. And then light came back on and the o’clock was reset. That means the car lost electric completely,
So I figured it could be alternator or ECM.
Cause 2 days back the elect gauge was reading almost 15 v running idle.
Tonight was reading 13+ v,

So what that might be, and where is BCM and ECM are located in the car, I used to have a caddy fleet wood BCM was behind glove compart and ECM was on firewall passenger side beneath dashboard.
thank you for your help

[avatar307]

Here's an idea. Take the car into AutoZone, Wal-mart, Goodyear, Midas, or where ever and have them test your battery and alternator.

[s426]

hello every one here is an update.
this morning i took off <-> batt cable to reset the ECM, so i took off also <+> , that was really bad. lots of white build up. so i metal brush that,then i start the car ,wow 30 minute no shutts off,gauge reading
14 1\2 v-15 v.
.i saved myself fuel pumb,ALT,batt,ECM,,if you know what i mean.

i woulg give 30%of the cost of all these parts and labor to charity.thank you LORD.
thank you all

[avatar307]

If it happens again within a year, I would be that you have a cracked in your battery around the terminal. Don't worry, the battery will fail soon enough.... right after it fills up with acid 3 more times and ruins your positive battery cable.