Electrical Mustang won’t start.

General karthief

wonder how much it would cost to ship you a pair
Mod Dude
Aug 25, 2016
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So? You just go right back out there and clean those cable clamps and connections right now young man,
Seriously, you have a bad connection between the battery and the starter or ignition switch or possibly a bad battery.
that's my guess.
 
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Brad Hanks

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Jul 21, 2017
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Cleaned the posts and terminals. 12.16 across the posts and 12.13 across the terminals. Between the pos post and terminal is where that’s going. Dont think that would make a difference though. Again I can’t test the voltage drop while cranking.
 

General karthief

wonder how much it would cost to ship you a pair
Mod Dude
Aug 25, 2016
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polk county florida
Ok, let me see if I can help you, here is how I would handle this,
i would, at this point I realize you have been given the link to figure this out (see, I sometimes have to back up and check on my train of thought)
Cleaned the posts and terminals. 12.16 across the posts and 12.13 across the terminals. Between the pos post and terminal is where that’s going. Dont think that would make a difference though. Again I can’t test the voltage drop while cranking.
A pic or two showing how you did this would be helpful, if you can check voltage across the batt posts why can't you test the cranking volts drop?
all you gotta do is watch the DVM while you turn the key to start, does the voltage change? If no, move on down the wire checking each connection for voltage to change, 12.16-12.13 is nothing, does not necessarily mean the battery is bad, it is a concern, but it may be it needs a little charge.
I believe this is covered in the no crank checklist I posted.
I believe it has illustrations
 

Brad Hanks

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Jul 21, 2017
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Update on this. Changed out the solenoid for the other one that was on there and it started with the key. Took it for a drive and brought it back was back to going to start and everything dead. I can jump the s to power and the solenoid will click. It has 12v from the clutch switch. Battery is showing 13v after a charge. I’ll get some updates on volt drops tomorrow.
 

Brad Hanks

Member
Jul 21, 2017
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Ok, let me see if I can help you, here is how I would handle this,
i would, at this point I realize you have been given the link to figure this out (see, I sometimes have to back up and check on my train of thought)

A pic or two showing how you did this would be helpful, if you can check voltage across the batt posts why can't you test the cranking volts drop?
all you gotta do is watch the DVM while you turn the key to start, does the voltage change? If no, move on down the wire checking each connection for voltage to change, 12.16-12.13 is nothing, does not necessarily mean the battery is bad, it is a concern, but it may be it needs a little charge.
I believe this is covered in the no crank checklist I posted.
I believe it has illustrations
 

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General karthief

wonder how much it would cost to ship you a pair
Mod Dude
Aug 25, 2016
20,321
6,893
203
polk county florida
Pic #1 shows O volts between the batt post and the cable clamp, pic #2 shows 12+ volts between the batt post and the solenoid stud, this tells me and this an observation from pics, that pics #1 shows a bad connection, now pjc #2 shows a complete circuit so that tells me either pic #1 is operator error or a loose/bad connection at that clamp.
This is only an observation based on pics and written word,
 

jrichker

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@Brad Hanks
@General karthief

0 volts between between the battery post and the cable clamp is good. The less voltage drop between connection points, the better the connection is.

12 volts between the battery cable clamp and the solenoid terminal is bad - that is a classic open circuit. Replace the short cable between the battery and the solenoid.

You should never use a cable clamp on a battery wire unless it s a very temporary repair. Replace the cable assembly as soon as possible.
 
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Brad Hanks

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Jul 21, 2017
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@Brad Hanks
@General karthief

0 volts between between the battery post and the cable clamp is good. The less voltage drop between connection points, the better the connection is.

12 volts between the battery cable clamp and the solenoid terminal is bad - that is a classic open circuit. Replace the short cable between the battery and the solenoid.

You should never use a cable clamp on a battery wire unless it s a very temporary repair. Replace the cable assembly as soon as possible.
 

Brad Hanks

Member
Jul 21, 2017
73
4
8
28
Pic #1 shows O volts between the batt post and the cable clamp, pic #2 shows 12+ volts between the batt post and the solenoid stud, this tells me and this an observation from pics, that pics #1 shows a bad connection, now pjc #2 shows a complete circuit so that tells me either pic #1 is operator error or a loose/bad connection at that clamp.
This is only an observation based on pics and written word,
Thanks.