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Joined: May 2016
Posts: 3
Grease Monkey
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OP
Grease Monkey
Joined: May 2016
Posts: 3 |
I am working on a 48 Chevy Thriftmaster that has no spark. I have replaced wiring, ignition coil, points, condenser, distributer cap, plus, and plug wires. I have comfirmed that there is 6V coming from the coil to the distributor but there is no spark. Any help would be appreciated
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Joined: Jan 2012
Posts: 131 Likes: 1
Shade Tree Mechanic
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Shade Tree Mechanic
Joined: Jan 2012
Posts: 131 Likes: 1 |
You should have 6-8 volts going into the coil but around 12,000 volts going from the coil to the distributor
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Joined: Jan 2002
Posts: 30,701 Likes: 141
ChatMaster - 25,000
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ChatMaster - 25,000
Joined: Jan 2002
Posts: 30,701 Likes: 141 |
In 1948 the early models had the polairty reversing switch (on top of the starter). The late 1948 did not have this feature. They also used a different set of points as the distributor is different.
If you have an early dist. and no reversing switch (they were often removed) it will be necessary to ground the dist. plate.
The early dist. had tow terminals for a wire, one on each side.
What is the number on the dist. plate?
Last edited by Chev Nut; 05/02/16 03:02 PM.
Gene Schneider
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Joined: May 2016
Posts: 3
Grease Monkey
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Grease Monkey
Joined: May 2016
Posts: 3 |
The number on the plate as near as I can tell is 1110090?7F12 I was unable to make out one number and that is the question mark
Last edited by Meadows; 05/02/16 03:29 PM.
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Joined: Jul 2015
Posts: 72
Shade Tree Mechanic
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Shade Tree Mechanic
Joined: Jul 2015
Posts: 72 |
I had the same problem on my 48 and also replaced everything you have, drove me nuts until this guy came over and showed me a loose wire coming from my ballast resister going to my battery terminal. Check to make sure all wires are on tight.
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Joined: Jan 2002
Posts: 30,701 Likes: 141
ChatMaster - 25,000
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ChatMaster - 25,000
Joined: Jan 2002
Posts: 30,701 Likes: 141 |
That is a distributor designed for use with a polairty reversing switch. If the switch has been removed attach a wire to the stud going through the side of the dist....the stud facing toward the push rod cover. Then run a ground wire from that stud to one of the screws on the push rod cover and check to see if you have spark.
You can get a better picturein two different places in the 1941-1946 shop manual.
Gene Schneider
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Joined: Oct 2007
Posts: 2,306
ChatMaster - 2,000
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ChatMaster - 2,000
Joined: Oct 2007
Posts: 2,306 |
Sometimes a picture is worth a thousand words! ![[Linked Image from i1321.photobucket.com]](http://i1321.photobucket.com/albums/u560/41chevymike/IMG_0078_zps0peyzomy.jpg) ![[Linked Image from i1321.photobucket.com]](http://i1321.photobucket.com/albums/u560/41chevymike/IMG_0080_zpsnqezk1bx.jpg) Good luck, Mike
Mike 41 Chevy
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Joined: Sep 2009
Posts: 6,689 Likes: 21
ChatMaster - 6,000
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ChatMaster - 6,000
Joined: Sep 2009
Posts: 6,689 Likes: 21 |
Note: If your model had the reverse polarity, you need to make that wire short and black to hide it. That long, red wire sticks out like a sore thumb and lets everyone know that something is not right.   Charlie 
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Joined: May 2016
Posts: 3
Grease Monkey
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Grease Monkey
Joined: May 2016
Posts: 3 |
I have no idea what I did but I hooked it up today before I started testing some other things and it had spark! So thank you all for your help!
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![[Linked Image from i1321.photobucket.com]](http://s1321.photobucket.com/user/41chevymike/media/IMG_0078_zps0peyzomy.jpg.html)
![[Linked Image from i1321.photobucket.com]](http://s1321.photobucket.com/user/41chevymike/media/IMG_0080_zpsnqezk1bx.jpg.html)
