Not starting issue, battery drains after sitting for twenty-four hours

Tiny
MARKSBOELTER
  • MEMBER
  • 2000 PONTIAC BONNEVILLE
  • 48,000 MILES
Well, sometimes starts after turning key several times. I found if I turn to accessory and wait for dash lights it starts if battery not drained. If the battery has drained after 24 hours of not running. I replaced the ignition switch didn't fix problem took car to coast GMC Mazda Buick dealer they replace module in cluster to do with gauges did not fix problem. They replaced module to do with theft deterrent system did not fix problem. Now they say it's the fuel pump will get car back Monday or Tuesday; they say this will fix problem. Spent a little over $3,000.00 so far counting fuel pump and all labor hope they are right, and this fixes it.
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Saturday, January 8th, 2022 AT 11:09 AM

34 Replies

Tiny
ASEMASTER6371
  • EXPERT
Good afternoon,

The proper way to diagnose the system is to charge the battery.

Then remove the negative cable and check the current draw. It should only be 50-75 milliamps. If it is more, then remove the fuses one at a time until the draw drops to normal. Then you need to find out what is on that circuit and disconnect the components until the drop is normal.

I attached a guide for you to follow.

https://www.2carpros.com/articles/car-battery-dead-overnight

Roy
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Saturday, January 8th, 2022 AT 1:14 PM
Tiny
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They had put in a new battery even though four other places said battery was good. Orielley's, Firestone, and Castriota Chevrolet said the battery was good. However, Coast GMC said it tested bad when they were replacing the first module cluster module to do with gauges.
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Sunday, January 9th, 2022 AT 12:30 PM
Tiny
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  • EXPERT
They need to do the procedure I posted.

Roy
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Sunday, January 9th, 2022 AT 12:49 PM
Tiny
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  • MEMBER
They did a battery draw test 3 times now but I was not present and I did not have this info, but they should be calling me tomorrow. I have the new fuel pump installed they said that would solve the problem. I hope they are right.
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Sunday, January 9th, 2022 AT 8:41 PM
Tiny
ASEMASTER6371
  • EXPERT
I doubt it very much.

Keep me updated on the progress.

Roy
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Monday, January 10th, 2022 AT 1:36 AM
Tiny
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Will do.
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Monday, January 10th, 2022 AT 7:56 AM
Tiny
ASEMASTER6371
  • EXPERT
It sounds like they do not know what they are doing.

Roy
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Monday, January 10th, 2022 AT 9:49 AM
Tiny
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  • MEMBER
Got the car it started right up at dealer had a full tank of gas and trip reset when I filled it and it only had 61 miles on trip reset. After they replaced the fuel pump now it's reading 2 lines under half tank. Key was warm when I took it out of ignition. Went out to car to go get gas at gas station and would not start two attempts called dealer and went back out to car turned key part way waited 2 seconds for dash light then it started. Which was one of the reasons I brought it to dealer that and battery draining overnight. So now I get to wait and see if it will start tomorrow or if battery drained.
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Monday, January 10th, 2022 AT 3:33 PM
Tiny
ASEMASTER6371
  • EXPERT
Something is not right.

Keep me updated.

Roy
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Wednesday, January 12th, 2022 AT 2:52 AM
Tiny
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  • MEMBER
Took car back to the same GMC dealer he said its normal to have to prime the pump by turning key and waiting 2or 3 seconds because the car is 20 years old. I called Firestone as they are familiar with the car and the problem I was having as I took it there first when I was having this problem, they said it's not normal and when I told him they just replaced fuel pump he said it should not be losing its prime. Only good news was the battery did not drain, but this is how the problem started back in August and then by September the battery would drain overnight.
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Wednesday, January 12th, 2022 AT 12:55 PM
Tiny
ASEMASTER6371
  • EXPERT
The pump should run for 2 seconds to prime the system. Then it should start right up.

Roy
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Wednesday, January 12th, 2022 AT 1:26 PM
Tiny
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  • MEMBER
When I described this problem, when I was first had this issue Joe was helping me, and he said that we needed to find out what was causing this delay. Other mechanics also told me this was not normal that the car should start right up without having to go to accessory first and wait 2 to 3 secs for dash lights to light also sent me videos on cam test wiring schematics and how to check for parasitic draw.
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Wednesday, January 12th, 2022 AT 5:16 PM
Tiny
ASEMASTER6371
  • EXPERT
That is correct. You should not have to turn to the accessory position first and then wait with it in the on position. Did anyone replace the ignition switch?

The draw is a separate issue from this.

Roy
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Thursday, January 13th, 2022 AT 1:22 AM
Tiny
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  • MEMBER
Yes, I did and the car still did the same exact thing also after Firestone said I needed to take it to a GM dealer.
I took it to Castriota Chevrolet they were going to change ignition switch told me I had not replaced ignition switch that I had replaced security module they were waiting for part. They had my car quite a while, then he said after giving him the part number and sent pic of box and the part and brought box with me and old part, he said I could take the car as I is no charge or he could throw parts at it. So, I then took it to Andrews auto the man worked on the several hours checking every fuse and relay all good battery and alternator good he put a switch on battery so I would not drain at night put switch down to right to engage battery start the car had to delay at accessory and started right up. When through driving car lift switch up disengage battery and it would not drain overnight.
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Thursday, January 13th, 2022 AT 7:14 AM
Tiny
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  • MEMBER
He only charged me $140.00 even though he had spent over 6 hours working on car he said he though I had a short in a wire somewhere and said he had a feeling it had to do with the security theft prevention module and that I needed to take it to GM dealer.
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Thursday, January 13th, 2022 AT 7:26 AM
Tiny
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  • MEMBER
So, I took it to coast gmc and brought all the diagnostics from castriota chevy all recipt and old parts and daignostic from firestone which said security theft module they ran diagnostick s and called me saying it would be $3,300 to fix car I said why so much he said I needed motor mounts and an oil change brake job and cluster module I said I just had oil changed 2 weeks earlier and there was a decal in window.
I asked how much for security module he said around 500 dolllars but they would have to take it out send it to be refurbished I said ok he said this was going to be acouple days and I could not take th car because the cluseter module had to do with odometer reading and it was illegal to drive car without it he said he could do the brake job in meanwhile I said ok he said my pads had 0.2 tread left then he calls me saying a rodent had eaten threw my injector wirers and it would be$ 400.00 to run new wire 0r I could just have them repaired for $ 40.00i said repair I asked how could rodent get in there as my car is garage kept and I do not have rodents but when hurricane Irma hit about 6 years ago I had to evecuate and went to Arkansaw and car was parked outside he said it looked rusty and that it had probably happened then so then he called me said they fixed wire did the brake job and rplaced the cluster they have 2 codes they have to clear and the car was ready to go. So I pick up the car everything seems fine thought it was fixed they charged m$1,785.00 I did njot drive the car after parking in garage or even try starting it the first time I go to use it battery dead I jumpstarted it
drive it there he said he would do battery draw again.
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Thursday, January 13th, 2022 AT 8:06 AM
Tiny
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  • MEMBER
Then he calls me said we are getting to codes back pointing to module to do with gauges and when I jumped it I my dash said check gages qand my fuel gage was on empty but after awhile went back to full. So he tells me its $200.00 for gauge module and 300 to install it iaske your getting 2 codes that sayits this what were the 2 codes you were getting before and how did you clear them he said hee would have to check with mecanic and call me back.
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Thursday, January 13th, 2022 AT 8:08 AM
Tiny
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Then the called me a nd said module is instaled come pick the car up and I had also mentined when I asked to see what wires they fixed he pulled some foam out from engine and said see this is where he started making a nest and when igot home I was picking the foam out and throwing it away and a sharp object pok.
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Thursday, January 13th, 2022 AT 8:18 AM
Tiny
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  • MEMBER
Poked my finger and dug it out from underneath it had 2 prongs where it hadean broken and it looked like it could of been used to scrape foam to make it look like teeth marks and when I looked at bill they charged $391.00 for the repair of those wires.
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Thursday, January 13th, 2022 AT 8:22 AM
Tiny
ASEMASTER6371
  • EXPERT
These guys have no clue how to find a draw. What a shame.

In an hour, you will have an answer. Instead, they are throwing parts at it.

Roy
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Thursday, January 13th, 2022 AT 8:24 AM

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