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Old 04-07-2013, 02:08 PM   #26
volvinator
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I had a battery cable get silly hot on an old MG one time when I had a bad ground. I touched the terminal and it burned me badly. Turned out the ground to the engine itself was in awful shape. The car would still start, just not as well as when I fixed it.
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Old 04-07-2013, 04:48 PM   #27
745 TurboGreasel
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Originally Posted by 740wagun View Post
I have now done the following checks (all while car is idling, no accessories):

-POS lead multimeter to POS alternator > NEG lead multimeter to POS starter = 0V
-POS lead multimeter to POS starter > NEG lead multimeter to POS battery = 0.9V (seems like a voltage drop)
-POS lead multimeter to POS starter > NEG lead multimeter to POS fuse box = 1.2V (even more of a voltage drop)
Also test from cable end to battery terminal.

Recently had a year old battery short internally, and it heated itself to the point of boiling and smelling like burning railroad ties. I unplugged it, and kept dousing it with water till it discharged itself and cooled off(about 2 hours), then exchanged it for a new one in the morning.
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Old 04-07-2013, 05:59 PM   #28
740wagun
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Also test from cable end to battery terminal.

Recently had a year old battery short internally, and it heated itself to the point of boiling and smelling like burning railroad ties. I unplugged it, and kept dousing it with water till it discharged itself and cooled off(about 2 hours), then exchanged it for a new one in the morning.
Ya I did that. O.00V
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Old 04-08-2013, 04:52 PM   #29
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V70 battery cables are notorious for going bad, it's not that hard to replace if you remove the airbox and some of the intake tubing, and even easier if you pull the fan out.
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Old 04-09-2013, 12:37 AM   #30
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I don't know if this helps, but back in the 70's some chrysler products had a problem with battery cable lead terminals melting. Turned out the starters were the cause.
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Old 04-09-2013, 12:46 AM   #31
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Im sure it is, so what does this mean?
high resistance = heat in electrical 12v DC circuit

Replace batt cable with new, or go to a larger gauge cable to help further.
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Old 04-09-2013, 12:57 AM   #32
TrickMick
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Default Why is my battery cable getting so hot?

PERSONALLY I believe it to be the lavender eye shadow,
the see thru tube top and the fishnet tights but that's just my
Dirty Old Man side comin' out.....
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Old 04-09-2013, 01:11 AM   #33
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Originally Posted by TrickMick View Post
PERSONALLY I believe it to be the lavender eye shadow,
the see thru tube top and the fishnet tights but that's just my
Dirty Old Man side comin' out.....
Revolting.
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Old 04-09-2013, 03:16 AM   #34
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Re-volting. Yet funny.
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Old 04-10-2013, 02:26 AM   #35
740wagun
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Ive got 0.5V lost between alt and fuse box.
-0.2V from alt to battery
-0.3V from battery to fuse box

Would the total of 0.5V cause my lights to flicker and battery cables to get hot?
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Old 04-10-2013, 09:05 AM   #36
TrickMick
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see # * 2 * & * 4 * (for a start at sorting the Voltage drop)

repeat the VOLVO LEKTRIKAL MANTRA with me *ONE MORE TIME* !
1) clean / tight /correctly sized CONNECTIONS *EVERYWHERE*
2) look for "creeping blue/green CRUD *up under* insulation" on BATTERY CABLES
3) fuses scrubbed and cleaned "contacts bent SNUG (if porcelain type use the COPPER
coloured ones *NOT* the "tin ones")
4) alternator terminals clean snug and GROUNDED to the BLOCK side of the motor mount and safe to the alternator
5) repair / replace harness bits that are crumbly-insulated on the "notorious DEATH PERIOD for harnesses"
6) when in doubt VOLTAGE DROP TEST / check RESISTANCE ACROSS a CONNECTION
7) dielectric grease is an insulator..and that's as far as I'm gonna speak on the subject..I *DON'T* use it
on ANY electrical connection...I DO *seal* the back sides of connections to stop gas intrusion with it....EOS

once you've got the "wahrs sorted" you may proceed to testing VOLTAGE /
RESISTANCE / CAPACITANCE / INDUCTANCE / ETC....
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Old 04-10-2013, 09:06 AM   #37
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here we go again....twofers for the house!....

Last edited by TrickMick; 04-10-2013 at 09:11 AM..
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Old 04-10-2013, 10:03 AM   #38
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Quote:
Originally Posted by 740wagun View Post
Ive got 0.5V lost between alt and fuse box.
-0.2V from alt to battery
-0.3V from battery to fuse box

Would the total of 0.5V cause my lights to flicker and battery cables to get hot?
.5V is lost via resistance and making heat....
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Old 06-17-2014, 12:15 AM   #39
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I never sealed the deal on this thread.
My issue was a loose nut for the alternator charge wire on the back of the alternator.
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Old 06-17-2014, 01:15 AM   #40
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First place I'd check is the starter.
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