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1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks Discuss the Early Eighties Bullnose Ford Truck

PMGR starter

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Old May 3, 2018 | 02:47 PM
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PMGR starter

Quick question:

I read through Gary's write up and didn’t see this mentioned. Do I need a dedicated ground from the starter to the frame? If so, what post does it come off of? I’ve got three posts on my starter. The post that has the spade terminal with the wire that goes to the output side of the solenoid also has a black wire on it, see pick below. But none of the diagrams i see show to ground it.

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Old May 3, 2018 | 05:47 PM
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There is no ground on the starter. It grounds through the mounting bolts to the engine block.
 
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Old May 3, 2018 | 06:25 PM
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Ok great. That’s what i thought but got worried when looking at the wiring and some of the rudimentary diagrams i saw on line
 
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Old May 4, 2018 | 08:15 AM
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What is the reasoning for wiring the PMGR starter to the opposite terminal on the starter solenoid? How does that not keep the starter from going non stop? Last night I touched the battery cable to the battery out of curiosity and the starter immediately started. I don't have the ignition switch wired up yet, so I assume that this condition won't be an issue when I wire the ignition up. I am moreso just curious of how it works.

 
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Old May 4, 2018 | 10:17 AM
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Check to see if your battery cable is touching the switch terminal on the starter solenoid. It looks very close in your picture
 
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Old May 4, 2018 | 12:45 PM
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I went home during my lunch break and checked...they don't appear to be touching.

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Old May 4, 2018 | 12:57 PM
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Why are there 2 wires on the switch terminal?
 
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Old May 4, 2018 | 01:11 PM
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The black one is not connected to anything. It’s just a pigtail.
 
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Old May 4, 2018 | 01:22 PM
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If the battery cable is touching the motor terminal ( the one with the braided wire going into the starter) you would hear the starter run when you connect the battery but it wouldn't be cranking the engine. The only way the starter will engage the flywheel and crank is if there is voltage on the switch terminal ( the one with the spade connector). You also could remove the pigtail since it isn't connected. The pigtail is there to eliminate the spade connection. Ford changed the design in later years because of a corrosion problem with the spade.
 
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Old May 4, 2018 | 01:34 PM
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It’s definitely cranking the engine. I’ve got it wired like the diagram above with the switched going to the opposite side of the starter solenoid from the battery. The starter battery wire is going to the battery side of the solenoid.

I do not have the ignition switch connected at all. Is that why this is happening?
 
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Old May 4, 2018 | 01:43 PM
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Pull the switch wire off of the starter. If it still cranks when you hook up the battery I would suspect a defective starter. If it doesn't crank, check the switch wire to see if there is voltage on it.
 
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Old May 4, 2018 | 01:48 PM
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Originally Posted by Gigemags05
It’s definitely cranking the engine. I’ve got it wired like the diagram above with the switched going to the opposite side of the starter solenoid from the battery. The starter battery wire is going to the battery side of the solenoid.

I do not have the ignition switch connected at all. Is that why this is happening?
This starter is not meant to be wired like the diagram shows thats why

It should be done as such

 
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Old May 4, 2018 | 01:54 PM
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All the write ups i have found, including Gary’s, says that the PMGR starter is to be wired like that diagram. That was really weird to me too. Every other starter and solenoid I’ve worked with has been as you show.
 
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Old May 4, 2018 | 02:09 PM
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Sorry but I have to disagree with the last diagram. Putting a jumper on the solenoid will cause the starter to stay engaged for a few seconds after starting. The first diagram is correct
 
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Old May 4, 2018 | 04:38 PM
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Originally Posted by kh0432
Sorry but I have to disagree with the last diagram. Putting a jumper on the solenoid will cause the starter to stay engaged for a few seconds after starting. The first diagram is correct
No it wont stay in egauged for a few seconds. It will wind down a bit slower that is it. The above is exactly how Ford did PMGR starters initially and did so for over 20 years starting in the early 70's.

Do not use the start relay to switch the start solenoid as they rely on a higher amp draw to insure continuity.
 
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