Slow cranking starter.
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Tourer
Joined: Feb 2015
Posts: 370
Likes: 16
From: Kansas
Slow cranking starter.
https://www.hdforums.com/forum/evo-c...king-87-a.html
My 88 FLHTC has been cranking real slow. Much like what the OP describes in the link above. I followed Dr.Hess suggestion in the link and tested the voltage. I found that the voltage drops significantly at the terminal on the solenoid where the power wire goes to the starter when I push the start button.. The voltage at the other terminal is equal to the voltage at the battery when I hit the start button. Does this mean that the solenoid is bad and needs replaced or is there another problem? I did check for loose connections and found none.
My 88 FLHTC has been cranking real slow. Much like what the OP describes in the link above. I followed Dr.Hess suggestion in the link and tested the voltage. I found that the voltage drops significantly at the terminal on the solenoid where the power wire goes to the starter when I push the start button.. The voltage at the other terminal is equal to the voltage at the battery when I hit the start button. Does this mean that the solenoid is bad and needs replaced or is there another problem? I did check for loose connections and found none.
Tourer
Joined: Mar 2009
Posts: 406
Likes: 122
From: Iowa
I found that the voltage drops significantly at the terminal on the solenoid where the power wire goes to the starter when I push the start button.. The voltage at the other terminal is equal to the voltage at the battery when I hit the start button. Does this mean that the solenoid is bad and needs replaced or is there another problem?
Voltage across battery terminals before trying to start: _________
Voltage across battery terminals while trying to start: _________
Voltage at the solenoid post connected to the battery while cranking: _________
Voltage at the solenoid post connected to the starter while cranking: _________
If the voltage is different between the two solenoid posts while cranking, it sounds like you're getting a voltage drop there, which could very well be bad contacts inside the solenoid.
Road Master
Joined: Aug 2007
Posts: 942
Likes: 323
From: Grew up in Texas, moved to AZ
Have numbers from test would really help.
Age and charge of your battery? Check grounding? This symptom is 90% a weak battery, especially when it's something that is gradually getting worse.
Age and charge of your battery? Check grounding? This symptom is 90% a weak battery, especially when it's something that is gradually getting worse.
Road Warrior
Joined: Apr 2016
Posts: 1,528
Likes: 933
From: Long Island
My 86 always had starter stall,especially when cold, hit the button a second time usually gets it cranking.and always used Mobil 1 15-50 showing no wear after 34k
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Tourer
Joined: Feb 2015
Posts: 370
Likes: 16
From: Kansas
Don't remember the numbers exactly but I can check when I get home. Here's close numbers though........
At the battery.......12.7-12.9 this one I remember.
At battery when cranking.........10-11
At solenoid from battery..........10-11
At solenoid ro starter........4-5
At the battery.......12.7-12.9 this one I remember.
At battery when cranking.........10-11
At solenoid from battery..........10-11
At solenoid ro starter........4-5
Tourer
Joined: Mar 2009
Posts: 406
Likes: 122
From: Iowa
These two posts should be connected together inside the solenoid when the plunger pulls in, so the voltage at each of them should be the same, or very nearly so.
Looks like a probable bad solenoid to me.
Thread Starter
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Tourer
Joined: Feb 2015
Posts: 370
Likes: 16
From: Kansas
That's what I thought. Looks like I'm replacing the solenoid.
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