electric issues

dmoney3299
55

Asked by Mar 19, 2013 at 07:52 AM about the 2000 Chevrolet Blazer 2 Door LS 4WD

Question type: Maintenance & Repair

i replaced my battery and altenator but when i shut my car off battery light pops on but than goes off n when i crank
it over to start the battery guage goes over 9 volts but when i start it it goes back to 14 volts. why is it doing that? i
bought a new battery and altenator and still cant figure it out? and when i hold my window switch all the way up
eveen tho the windows all the way up my lights on my truck start flickering why is that? i need help plz can some
one help me befor i put anymore money into it.

7 Answers

The voltage drop is normal on the gauge while starting, the battery is under a heavy load and the draw will drop the gauge...besides those gauges on the dash are notoriously inaccurate. If you really want to know for sure, get a volt meter and have helper put it directly on the battery and watch it while you crank it. Granted, dropping to 9 volts is a bit low, but acceptable as long as it goes back to 13 or so after it starts. Now the light flickering is an altogether different thing. Headlights you mean? But if they work fine otherwise, maybe replace the relay and not worry about it.

1 out of 1 people think this is helpful.
Tom Demyan
200,625

Were you having issues before the battery and alternator swap? You might have a faulty alternator right out of the box, especially if it was a rebuilt vs new. Check your voltages as David suggests to confirm or have it bench tested.

2 out of 2 people think this is helpful.

Thanks Tom. It's flattering and encouraging to have somebody agree with a suggestion on a way do do something. I have bought power steering pumps, alternators, water pumps, headlights, that were faulty out of the box over the last 45 years of part~buying , and I go to known stores. I avoid PepBoys though.

dmoney3299
55

the thing is i have a car system and my amp is 2000 watss thats why i replaced them, because i beleive my system messed my alternator and battery up, and i lowerd it down and bought a new compacitor for it but it seems to keep messen with my voltage so i turned the system down but just feel its going to mess it up again, and i dont need that! i just think something else wrong and i cant figure it out. but it seems to run fine now but im just worrying it might mess up agian, and i have one other questions my fuse for my dome light and 4x4 is blowed but everytime i put a fuse in 10amp it keeps blown them and thats what it calls for, that also dont make no since to me???? u think there could be a electrical issue with my truck???

There is obviously an electrical problem when a fuse(s) keep blowing. Now diagnosing them is difficult to virtually impossible without being at the truck. Wires need to be traced. Relays need to be tested and/or swapped. Can you get a hold of a scan tool and read the OBD yourself? Buy one. Maybe the parts store will rent one, if you are unable to get it to the store. The scanner supplies it's own power. Couple of AA's. Maybe four. And get a multi~meter

dmoney3299
55

i can drives it there, but what do i tell them to do from yhere?

Ask them to read your OBD codes. They will do it free, they want to sell you a part, but don't buy anything; unless you are fully convinced the guy 1) knows what he is doing and 2) is honest. Either that or write down the fault numbers...PXXXX...or the like and bring them back here. One of us will help you.

Your Answer

Add photo

Related Questions

  • Electrical Issues 6 answers

    Truck would turn over but not start and was found with bad fuel pump. Replaced it and assembly. Day later it shut off while moving in drive 2 times. A second mechanic found no obvious causes and sai...

    1999 Chevrolet Blazer 4 Door LS 4WD

    -

    Maintenance & Repair

  • 2004 Chevrolet Blazer electrical issue while running. 2 answers

    Lately I have been having electrical issues while driving. The issue is that while driving down the road the volt meter will drop below the 14 volt mark and further when I turn on the AC. When I app...

    2004 Chevrolet Blazer 2 Door LS 4WD

    -

    Maintenance & Repair

  • Got issues... Lots of issues 1 answer

    Hello, I have a 2003 Chevrolet Blazer 4x4 V6 4.3L, and I have issues. First issue is some days it won't start, I put the key in turn it to start it and everything blacks out. Now my battery is dra...

    2003 Chevrolet Blazer 4 Door LS 4WD

    -

    Maintenance & Repair

  • My 2002 Chevy Blazer Electrical system failed 1 answer

    Last week. I noticed a loud noise in the vehicle also a service light shows as well as the abs again. The back taillights stopped working The power windows stopped working The radio stopped working Th...

    2002 Chevrolet Blazer 2 Door LS 4WD

    -

    Maintenance & Repair

  • electrical issues 11 answers

    here's a doozy for anyone who is an electrical genius and can figure out what really ails my truck: Here are the issues: 1) lights have gone out while driving during the night (this has happened 2 t...

    2003 Chevrolet TrailBlazer LS 4WD

    -

    Maintenance & Repair

Blazer

Looking for a Used Blazer in your area?

CarGurus has 1,651 nationwide Blazer listings starting at $1,377.

ZIP:

Search Chevrolet Blazer Questions

Chevrolet Blazer Experts

#1 Andrew Olsen
Andrew Olsen
Reputation 1,650
#2 yetilikesbeer
yetilikesbeer
Reputation 1,010
#3 Js08016
Js08016
Reputation 620
View All

Related Models For Sale

Used Chevrolet Tahoe"
966 Great Deals out of 36,462 listings starting at $2,095
Used Chevrolet S-10"
15 Great Deals out of 1,820 listings starting at $1,749
Used Chevrolet Silverado 1500"
2,176 Great Deals out of 134,612 listings starting at $1,500
Used GMC Jimmy"
368 listings starting at $1,900
Used Ford Explorer"
1,141 Great Deals out of 68,036 listings starting at $1,000
Used Ford F-150"
2,850 Great Deals out of 202,781 listings starting at $1,500
Used Jeep Grand Cherokee"
1,127 Great Deals out of 74,037 listings starting at $495
Used Jeep Cherokee"
288 Great Deals out of 52,341 listings starting at $2,495
Used Chevrolet Camaro"
711 Great Deals out of 37,546 listings starting at $2,650
Used Jeep Wrangler"
355 Great Deals out of 14,790 listings starting at $2,795
Used Chevrolet Suburban"
564 Great Deals out of 24,134 listings starting at $1,000