battery wont hold charge

CanadianBak'inSupra · 05-07-2010, 12:30 PM

ok this is just dumb.

i left my lights on in my 1984 toyota celica supra 5m-ge and i got a friend to jump it the next day. i let him put the cables on his truck and did not watch him. when i went to put them on mine i got lots of sparks...

i look and hes got his cables backwards....

charged the battery for a bit went for a drive and my head lights dont work, and my alternator is not charging the battery... so im assuming that it broke my alt. but what else can happen if some one hooks the cables up backwards...

i feel dumb for letting someone else do somthin like that on my car so no opinions plz.

btwilson86 · 05-07-2010, 05:12 PM

I'm not sure, but don't the 5M harnesses have some sort of fusible link for the alternator that could have blown?

Also, you can check your voltage output at the alternator to verify if it is or is not producing power. Grab a voltmeter and connect the + lead to the + lug on the alternator, and the - lead to ground.

05-07-2010, 12:30 PM	#1
CanadianBak'inSupra Official hall monitor / search nazi - NO SOUP FOR YOU! Join Date: Oct 2009 Location: Canada, BC Posts: 837	battery wont hold charge ok this is just dumb. i left my lights on in my 1984 toyota celica supra 5m-ge and i got a friend to jump it the next day. i let him put the cables on his truck and did not watch him. when i went to put them on mine i got lots of sparks... i look and hes got his cables backwards.... charged the battery for a bit went for a drive and my head lights dont work, and my alternator is not charging the battery... so im assuming that it broke my alt. but what else can happen if some one hooks the cables up backwards... i feel dumb for letting someone else do somthin like that on my car so no opinions plz. __________________ 1984 supra - 1uzfe - w58 - 4.10 - 1 piece aluminum shaft.

05-07-2010, 05:12 PM	#2
btwilson86 Super Moderator Join Date: May 2007 Location: Billings, Montana Posts: 1,034	I'm not sure, but don't the 5M harnesses have some sort of fusible link for the alternator that could have blown? Also, you can check your voltage output at the alternator to verify if it is or is not producing power. Grab a voltmeter and connect the + lead to the + lug on the alternator, and the - lead to ground. __________________ 1989 7MGTE R154 Targa Top White Package w/Blue Interior Driftmotion 57trim CT26, Upgraded Intercooler, 2.25" Hard Pipes, 3" Turbo Back Exhaust with Test Pipe, HKS VPC w/GM 3 bar MAP sensor, APEXi S-AFC, Walbro 255lph fuel pump, ProSport EVO Series Boost / Fuel Pressure / AFR gauges, Lotek a Pillar Gauge Pod, HKS Type 0 Turbo Timer, Eibach Lowering Springs, Tokico Illumina II TEMS struts, custom powder coated Motegi Racing TrakLite wheels

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