DodgeCharger.com Forum

Mopar Garage => Electric, Gauges, & Lights => Topic started by: John Milner on July 22, 2019, 08:28:51 PM

Title: Melting starter wires
Post by: John Milner on July 22, 2019, 08:28:51 PM
What would cause the starter wires on a 68 charger to get hot and start to melt? The starter is new, relay is new, starter wires are new, engine wiring harness is new. I started my car for the first time the other day after restoring it and it worked fine. I'm at a loss.
Title: Re: Melting starter wires
Post by: c00nhunterjoe on July 22, 2019, 08:31:54 PM
The main battery wire melted? Was this while cranking? If so how long were you cranking. Verify good grounds regardless.
Title: Re: Melting starter wires
Post by: b5blue on July 22, 2019, 08:42:45 PM
Check connections and crimps, I had loose crimp at battery.
Title: Re: Melting starter wires
Post by: John Milner on July 22, 2019, 09:35:32 PM
Quote from: c00nhunterjoe on July 22, 2019, 08:31:54 PM
The main battery wire melted? Was this while cranking? If so how long were you cranking. Verify good grounds regardless.

Yes it was the main battery wire. It started smoking pretty good and melted some of the red insulation off. I cranked it maybe 10 seconds? It worked great the other evening. I'll double check grounds.
Title: Re: Melting starter wires
Post by: c00nhunterjoe on July 23, 2019, 05:50:00 AM
High amp draw. Low battery, bad starter, or bad ground.
Title: Re: Melting starter wires
Post by: krops cars on July 23, 2019, 08:39:16 AM
You can always add extra grounds. I always do. Helps everything.
Title: Re: Melting starter wires
Post by: John_Kunkel on July 23, 2019, 01:48:22 PM
Quote from: c00nhunterjoe on July 23, 2019, 05:50:00 AM
Low battery, bad starter, or bad ground.

:iagree: Make sure the battery negative cable attach point has a good clean contact with the block.
Title: Re: Melting starter wires
Post by: krops cars on July 23, 2019, 02:04:29 PM
That is a very good point.
Title: Re: Melting starter wires
Post by: XH29N0G on July 23, 2019, 03:10:03 PM
For what it is worth, a new set of battery cables was installed when my car was restored.  The plastic melted and wore off because the wired heated up.  They were flexible cables, but too small of a gauge to transmit the current without heating up.  I replaced them with a larger diameter (lower gauge wire) and the problem went away.  This may not be your problem, but I would look into the gauge of the cables from the battery.  If I see the thread, I will post the link.

 
Title: Re: Melting starter wires
Post by: gtx6970 on July 23, 2019, 04:26:03 PM
starter dragging or to small a main bat cable IMO
Title: Re: Melting starter wires
Post by: John Milner on July 26, 2019, 02:14:58 PM
I am going to just blame it on a bad battery cable.  I installed another one and another starter relay and I'm back in business.  The starter relay was broken.  I opened it up and one of the contacts inside had dislodged.  I ended up re-using my 1968 original Mopar relay.  I'm having less faith in "new" parts as each day goes by.
Title: Re: Melting starter wires
Post by: XH29N0G on July 26, 2019, 03:12:21 PM
In my case, there were several options, and the one that was chosen was the least expensive.  The problem never reoccurred after I replaced with a new, but heavier duty battery cable which was more expensive.  Good luck with your fix  :2thumbs: