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EFV-8 Club Forum / General Ford Discussion / Polarity and starter

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Discussion Topic: Polarity and starter -- page: 1 2

46coupe

04-12-2016 @ 1:26 PM

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Thanks for the help, Tom. I'll be working on this on Thursday and will let you and everyone know what I find.

TomO

04-12-2016 @ 10:01 AM

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If your starter turns slow:
Connect your voltmeter across the battery posts and operate the starter with the ignition off. The meter should read 5.5 Volts or more. If not the battery is discharged or weak. Charge or replace the battery.

Connect the COM lead of your meter to the NEG post of the battery and the POS lead of your meter to the post on the starter. Operate the starter with the ignition off. The meter should read 0.3 Volts.

If you have a reading higher than this, it indicates excessive resistance in the circuit. To isolate the problem, move your POS lead back towards the battery one connection at a time and repeat the test. Each time you move it the reading should decrease by 0.1. When you reach the point where the reading changes by more than 0.1, you have found the problem.

Connect the POS lead of your meter to the POS terminal of the battery and the COM lead to the case of the starter. Operate the starter with the ignition off and read the voltmeter. It should read 0.1 or less.

A higher reading indicates problems in the grounding circuit. To isolate move the lead back to the engine grounding strap and repeat the test. If the reading is normal, pull the starter and clean the mounting surface, otherwise clean the grounding points and replace the grounding straps.

If all of the reading are OK, the problem is in the starter or a bind in the engine.

Tom

46coupe

04-11-2016 @ 6:12 PM

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Got the cable today. Tom, what procedure do you recommend using the volt meter? I also might pull the starter as recommended. Probably needs it anyway.
I'll try checking the past posts as suggested. Thank you.

Chascwell2

04-09-2016 @ 3:20 PM

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I found great results getting my starter to spin like it should by pulling the starter and lubricating the armature bushings, while it was out, took some garnet paper and cleaned up the armature

chascwell

TomO

04-09-2016 @ 7:19 AM

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Rather than scrolling back through all of the posts, you can do a search on your user name to find all of the posts that you started or replied to. Click on the SEARCH box in the welcome message box.

Tom

46coupe

04-08-2016 @ 2:38 PM

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Thank you all for your help. I've ordered the correct cable and hope to begin trouble shooting when everything arrives. Thanks, Tom for sending my old post. I guess I didn't go back far enough in the posts. I didn't remember that the posts were in December. SO much for memory:)
When the car starts, I'll post results here.

JT Ford

04-08-2016 @ 11:25 AM

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Be sure that the 48 inch cable from the starter solenoid to the starter is a heavy cable also.

TomO

04-08-2016 @ 7:56 AM

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Here is a link to your previous post

http://www.earlyfordv8.org/forum/viewmessages.cfm?Forum=18&Topic=9237&keywords=

To determine the procedure to go back to POS ground, you need to know what steps were taken to change it to NEG ground or replace the voltage regulator and coil with new ones that are POS ground. Then you need to reverse the wires going to your ammeter so it reads correctly.

If your starter still turns slow after replacing the cables, you will need to use a voltmeter to determine where the problem is. If you feel comfortable using a voltmeter, I can give you the method to isolate your problem.

Tom

46coupe

04-07-2016 @ 1:39 PM

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Yeah, the 8 volt worked. Then 2 days ago I tried to start the car and the engine turned over very slow. Charged the battery which showed 8.2 V on the meter. Still no help so I took it to a repair shop and he ran a load test on it, which failed. Picked up the new battery today. Shows 6.2 V and same problem. The store asked me to bring it back. In the meantime since last posting, I ordered a new positive to solenoid cable which is a duplicate of the original, ie, thicker wire. While waiting I will start testing connections and finish cleaning another ground strap I found.

CharlieStephens

04-07-2016 @ 1:23 PM

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RESPONDING TO:
"Thanks for all the suggestions. Ground wires were cleaned and go from the battery to engine, engine to body. I will check for other grounds and clean them as suggested, I didn't know about the difference in battery cables so I will order new ones. The starter turned over great the last time I started it (3 mos ago)so I'll check that as well. You're right about going back to positive ground. The car is pretty much all original and should be set up as such. Thanks again.
"

From your first post I thought you had the 8 volt battery in it 3 months ago and now you have a 6 volt and need to find the real problem.

Charlie Stephens

This message was edited by CharlieStephens on 4-7-16 @ 1:26 PM

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