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Posted: 9/26/2018 9:39:03 PM EDT
[#1]
Short in the jumpee?
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Posted: 9/26/2018 9:39:35 PM EDT
[#2]
Resistive Heating
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Posted: 9/26/2018 9:39:36 PM EDT
[#3]
Current.
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Posted: 9/26/2018 9:40:24 PM EDT
[#4]
You need bigger cables. Have some made out of 00 cable.
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Posted: 9/26/2018 9:40:42 PM EDT
[#5]
Pulling more current than the wire thickness is rated for at that length. Good jumper cables are fucking thick and heavy. Pick up a jump pack. Best money ever spent.
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Posted: 9/26/2018 9:41:23 PM EDT
[#6]
Use two sets of cables so they don't have as much current going through each set
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Posted: 9/26/2018 9:41:28 PM EDT
[#7]
Too much current for your cheap cables.
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Posted: 9/26/2018 9:41:43 PM EDT
[#8]
Quote HistoryQuoted:
Short in the jumpee? |
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Posted: 9/26/2018 9:41:44 PM EDT
[#9]
Lots of amps going through them.
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Posted: 9/26/2018 9:42:19 PM EDT
[#10]
What's the wire gauge of your cables?
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Posted: 9/26/2018 9:42:36 PM EDT
[#11]
Stop buying cheap jumper cables, the cheapos have a higher gauge of wire (Means less copper) and will not be able to handle the full amount of current going through them.
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Posted: 9/26/2018 9:42:43 PM EDT
[#12]
Amps, resistance, voltage and all that jazz.
get bigger cables or clean the connections |
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Posted: 9/26/2018 9:43:07 PM EDT
[#13]
Quote HistoryQuoted:
Too much current for your cheap cables. |
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Posted: 9/26/2018 9:43:12 PM EDT
[#14]
Quote HistoryQuoted:
What's the wire gauge of your cables? |
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Posted: 9/26/2018 9:43:57 PM EDT
[#15]
Quote HistoryQuoted:
Too much current for your cheap cables. |
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Posted: 9/26/2018 9:44:35 PM EDT
[#16]
Angry pixies be extra angry!
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Posted: 9/26/2018 9:44:44 PM EDT
[#17]
The cables in my Civic are cheap. Have better one's in the Pilot, but the wife has it now - carting kids around
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Posted: 9/26/2018 9:45:12 PM EDT
[#18]
Cheap Wal-Mart cables, total junk.
If they're good cables, buy new battery for dead car, cell shorted out. Edit: If you're jumping it every day maybe you should get a new battery, ya think? |
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Posted: 9/26/2018 9:45:14 PM EDT
[#19]
Shorted battery .
edit : beat by 2 seconds ^^ |
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Posted: 9/26/2018 9:47:00 PM EDT
[#20]
You should be pulling the battery and putting it on a regular charger unless you're stranded.
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Posted: 9/26/2018 9:47:12 PM EDT
[#21]
Your battery may have a shorted cell -- or two. It could be dangerous.
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Posted: 9/26/2018 9:47:59 PM EDT
[#22]
Could be a bad connection between the cable and clamp, but not likely.
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Posted: 9/26/2018 9:48:01 PM EDT
[#23]
Heat comes from resistance.
Resistance comes from several places...cables too small, poor connections, too much draw for the cables, cars touching, bad battery, and so on. The big things- make sure the cars are not touching. Ensure a rock solid connection to the terminals. Go terminal to terminal instead of a heavy metal engine part. Also...never loop a cable over itself and ensure the cables are dry, clean, and undamaged....not kinked or crushed anywhere. |
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Posted: 9/26/2018 9:48:33 PM EDT
[#24]
High compression OM617 diesel engine vs dinky Honda Civic alternator plus undersized cables = lots of heat. Been there, done that.
I suggest leaving the cables on and let the battery charge for 10-20mins before attempting a start. |
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Posted: 9/26/2018 9:49:23 PM EDT
[#25]
Quote HistoryQuoted:
I checked the cables for good connection and noticed they are more than warm Quote HistoryQuoted:
I checked the cables for good connection and noticed they are more than warm Quoted:
I jumped it yesterday with heavier cables. I noticed them getting a little warm 
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Posted: 9/26/2018 9:50:43 PM EDT
[#26]
I totally understand the cheap cable issue. I just never experienced this before and wanted to make sure I wasn't doing something stupid
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Posted: 9/26/2018 9:51:41 PM EDT
[#27]
An employee's gilfriend had a Triumph TR7.
The battery was low so he tried to trickle charge it. He reversed the polarity. The car caught on fire. Total write off. She left him. |
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Posted: 9/26/2018 9:53:06 PM EDT
[#28]
Quote HistoryQuoted:
Cheap Wal-Mart cables, total junk. If they're good cables, buy new battery for dead car, cell shorted out. Edit: If you're jumping it every day maybe you should get a new battery, ya think? Measures 8 volts while car is off |
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Posted: 9/26/2018 9:54:35 PM EDT
[#29]
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Posted: 9/26/2018 9:55:49 PM EDT
[#30]
Quote HistoryQuoted:
You need bigger cables. Have some made out of 00 cable. |
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Posted: 9/26/2018 9:57:44 PM EDT
[#31]
I'd say 12.5 volts is way too low for proper charging. There might be something wrong with the charging system in the Mercedes.
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Posted: 9/26/2018 9:57:52 PM EDT
[#32]
Quote HistoryQuoted: Battery is brand new, but I haven't driven it in a few months. I jumped it yesterday and let it run for 30 minutes. I measured 12.5 volts across the battery while running and assume that meant the alternator was charging it Measures 8 volts while car is off |
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Posted: 9/26/2018 9:58:32 PM EDT
[#33]
Electrical issue with the MB.
Try jumping with its battery disconnected, and have the Civic running. |
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Posted: 9/26/2018 9:59:00 PM EDT
[#34]
Lol.
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Posted: 9/26/2018 9:59:42 PM EDT
[#35]
Quote HistoryQuoted:
12.5V seems low. Quote HistoryQuoted:
Quoted: Battery is brand new, but I haven't driven it in a few months. I jumped it yesterday and let it run for 30 minutes. I measured 12.5 volts across the battery while running and assume that meant the alternator was charging it Measures 8 volts while car is off |
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Posted: 9/26/2018 10:01:03 PM EDT
[#36]
Quote HistoryQuoted:
An employee's gilfriend had a Triumph TR7. The battery was low so he tried to trickle charge it. He reversed the polarity. The car caught on fire. Total write off. She left him. |
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Posted: 9/26/2018 10:01:41 PM EDT
[#37]
Quote HistoryQuoted:
Probably doing the best it can. 8 volts on battery while off says battery is FUBAR'd |
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Posted: 9/26/2018 10:03:41 PM EDT
[#38]
Quote HistoryQuoted: Battery is only a few months old. I put it in, and haven't driven the car |
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Posted: 9/26/2018 10:07:08 PM EDT
[#39]
You said you checked the polarity, but you didn't say HOW you connected them.
Red to red, or red to black? |
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Posted: 9/26/2018 10:08:59 PM EDT
[#40]
Quote HistoryQuoted:
A new battery can be defective. |
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Posted: 9/26/2018 10:09:51 PM EDT
[#41]
Quote HistoryQuoted:
You said you checked the polarity, but you didn't say HOW you connected them. Red to red, or red to black? - to - |
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Posted: 9/26/2018 10:10:05 PM EDT
[#42]
Quote HistoryQuoted:
Resistive Heating |
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Posted: 9/26/2018 10:10:09 PM EDT
[#43]
Internal short in dead battery, drawing too much current from good battery.
Or Cheap ass cables of insufficient size. |
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Posted: 9/26/2018 10:11:01 PM EDT
[#44]
Too light of cable, damaged cable, or poor connection between the clamps and cable.
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Posted: 9/26/2018 10:11:52 PM EDT
[#45]
Quote HistoryQuoted: Yeah. I am stuck on the thought it drained the alternator not charging it and just sitting there for a few months. |
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Posted: 9/26/2018 10:13:35 PM EDT
[#46]
Quote HistoryQuoted: Battery is brand new, but I haven't driven it in a few months. I jumped it yesterday and let it run for 30 minutes. I measured 12.5 volts across the battery while running and assume that meant the alternator was charging it Measures 8 volts while car is off |
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Posted: 9/26/2018 10:13:45 PM EDT
[#47]
Quote HistoryQuoted:
You said you checked the polarity, but you didn't say HOW you connected them. Red to red, or red to black? Fight the polacrity and just hook up the cables anyway you want. 
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Posted: 9/26/2018 10:15:45 PM EDT
[#48]
Quote HistoryQuoted:
Remove the battery and take it in to have it charged and tested. Once the battery is either confirmed good or replaced under warranty, have the alternator tested. I have the cables hooked up and the Civic idling now |
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Posted: 9/26/2018 10:16:28 PM EDT
[#49]
If the battery has 8 volts with the car off, it is done for.
With the car running, and only outputting 12.5 volts, you might need an alternator too. It should be reading 14.4 to 14.6 volts when the vehicle is running. Methinks you've got multiple issues. |
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Posted: 9/26/2018 10:18:25 PM EDT
[#50]
Quote HistoryQuoted:
Resistive Heating |
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