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01-10-2015, 09:47 PM
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#1 |
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Msgt USAF Ret
  
Join Date: Jan 2005
Location: Kalamazoo, Michigan
Posts: 8,719
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How our starters work
This may help a lot of you understand how the starter works and be able to trouble shoot them.
The starter cycle starts with the key switch turned to the ST position and power is routed via a 12 gauge purple wire to the neutral safety switch on automatics, and to a neutral or safety switch on the transmission, and some times on the later models, to a clutch switch. From there it goes through the firewall block to the S terminal on the starter solenoid. The solenoid is an electromagnetic device that also acts a relay. The electromagnetic function pulls the starter bendix lever and throws out the starter gear to engage the flywheel. At the same time the contact washer in the solenoid inside near the rear, moves to the rear and joins the two main terminals on the starter. The battery cable at the top and the starter field terminal at the bottom. Note the red arrows. This feeds battery power to the starter windings through the starter brushes and spins the starter armature turning the starter gear and the flywheel. When the key is released the key switch goes to the ignition position and releases power to the solenoid and a spring inside the solenoid returns it to the forward position breaking the contact on the two main terminals for the starter and the cycle stops. shown below.
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VetteVet metallic green 67 stepside 74 corvette convertible 1965 Harley sportster 1995 Harley wide glide Growing old is hell, but it beats the alternative. |
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01-10-2015, 10:18 PM
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#2 |
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Old member
Join Date: Jan 2002
Location: Liberty, & Garden City S.C. , U.S.
Posts: 19,945
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Re: How our starters work
VetteVet you are just amazing man! Great write up. This needs to be put in the electrical stickeys!
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1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs. |
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01-11-2015, 12:33 AM
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#3 |
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Registered User
Join Date: Jun 2013
Location: Somewhere
Posts: 3,126
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Re: How our starters work
Nice but the large + cable doesn't go through the junction block as suggested in pic #1.
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01-11-2015, 01:48 AM
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#4 |
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Senior Member
 
Join Date: Feb 2001
Location: New Madison, Ohio
Posts: 21,373
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Re: How our starters work
Great info
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A husband can be right...or...A husband can be happy.  67-72 Chevy and GMC Trucks...The Classic Truck for the Classic Folk.  1970 CST Two tone green, 402BB, 400 Automatic, Tach, Buckets, AC, AM-FM, Tilt, GM CB, GM 8 Tract, LWB, etc   JOHN 17:3...The better side of "LIFE" Remember: Everyday is a good day...Some are just gooder! |
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