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Posted By: jer3545 54 Chevy no spark no start - Mon Nov 30 2015 11:18 PM
Well just maybe I can do this with some help ,because I am not real electrically incline but I have a spark tester and a mult-meter. I have no spark at the coil wire going to the distributer . I did at one time because I had it running this summer after I put a new coil, dist.cap, points , all spark wires & spark plugs. Clue;I had the ignition switch off to get new key made .I dont see any lose wire hanging ,and when I turn the key "ON" the batt.guage slightly moves toward dis. ,lights & horn work. what should I do next??Thank's for anything I can try .Like I said I do have a multi-meter and a spark tester. Thank's. Jerry
Posted By: Uncle Brad Re: 54 Chevy no spark no start - Mon Nov 30 2015 11:46 PM
What year/model/engine/6v/12v?

Don't leave that key in the "ON" position for too long if you aren't attempting to start.

Fully charged battery & Clean grounds? Is the wire from the coil's side to the distributor connected?
Manual for my year truck.
Brad
Posted By: 52Carl Re: 54 Chevy no spark no start - Mon Nov 30 2015 11:55 PM
By "no spark at the coil wire going to the distributor", do you mean no voltage?
Do you have voltage from the wire coming from the ignition switch at the coil?
If the answer to both of these questions in "yes", you either have dirty posts on the coil, a bad wire between the coil and the distributor, or a bad coil.
You can check all of these with your multimeter set on OHMS with the ignition off.
Carl
Posted By: jer3545 Re: 54 Chevy no spark no start - Tue Dec 01 2015 12:10 AM
Hey Uncle brad, this is a 54 chevy 235 in a 49 chevy truck and it has been converted to 12 volt . The wire from the coil is connected to the distributor and its tight it also has been replaced .
Posted By: jer3545 Re: 54 Chevy no spark no start - Tue Dec 01 2015 12:15 AM
Hi Carl , I cranked the engine and had a spark tester on the coil (plug) wire the big wire that goes to the center of the dist.cap. there was no spark . what you said about the multi meter check , not sure if I know how to do that check.
Posted By: jer3545 Re: 54 Chevy no spark no start - Tue Dec 01 2015 12:21 AM
Carl, Im going back out there to see if Im getting voltage from key switch to coil.
Posted By: jer3545 Re: 54 Chevy no spark no start - Tue Dec 01 2015 12:34 AM
ok, I put a test light on the pos.side of the coil and put the test light ground wire on a fender brace for ground and light did not light . The wire from the switch lights up . I believe its from the key switch goes up the firewall and over toward driverside in a wrap of wires.
Posted By: Volfandt Re: 54 Chevy no spark no start - Tue Dec 01 2015 12:37 AM
A few easy tests.
Remove dist cap and rotor button so you can see when points open and close.

1) Turn engine until the point are open.
2) turn key on, you shoulg read 8v - 12vdc on the "+" coil screw terminal and slightly less on the "-" terminal. If not your not getting any voltage to the coil.

Now turn engine until points are closed. You shouldn't read any volts (no voltage drop across a short).If you do the points contacts aren't conducting(file or replace) or the wire from the coil to the distributor is open (cut or bad connection at the terminals).

You should get spark out of the large high voltage coil wire by simply opening and closing the points with a non-conductive lever (to push the pints open and allow them to close again) with the key on.
Posted By: jer3545 Re: 54 Chevy no spark no start - Tue Dec 01 2015 12:40 AM
If I have a blown fuse on the fuse block could that be a start problem ??? I do have a fuse that looks blown but I have no cover for it so I dont know what it's for.
Posted By: jer3545 Re: 54 Chevy no spark no start - Tue Dec 01 2015 12:49 AM
OK Volfandt I will do this check also .I appreciate all the help from every one . I KNOW IT'S A PROCESS OF ELIMINATION ,IT"S DOING IT THAT"S HARD .....LOL.
Posted By: Uncle Brad Re: 54 Chevy no spark no start - Tue Dec 01 2015 01:23 AM
Edited - I don't think the truck came with a fuse block, or a fuse block cover, but you can trace the wires to see what it goes to.

Stick with Volfandt's process for now.

Brad


Posted By: tclederman Re: 54 Chevy no spark no start - Tue Dec 01 2015 01:53 AM
Originally Posted by Uncle Brad
Edited - I don't think the truck came with a fuse block, or a fuse block cover, but you can trace the wires to see what it goes to.

Stick with Volfandt's process for now.

Brad

1949 Chevrolet truck fuse box/block - figure 3
I connect read the name under STOP LIGHT?
Posted By: Uncle Brad Re: 54 Chevy no spark no start - Tue Dec 01 2015 03:05 AM
exploded diagram

There is a fuse box for sure... I best do some studying up.

Brad
Posted By: Mike B Re: 54 Chevy no spark no start - Tue Dec 01 2015 03:25 AM
Tim,

Looks like Horn Terminals to me...

Mike B smile
Posted By: jer3545 Re: 54 Chevy no spark no start - Tue Dec 01 2015 08:58 PM
Mike B. is right.There is a horn terminal ,one for high beam , I think low beam and brake&tail lights .
Posted By: Steve_H Re: 54 Chevy no spark no start - Wed Dec 02 2015 01:38 AM
Often when working on a modified truck(yours is converted to 12 Volt so modified) Things get lost that matter.
1, There is a fuse block: 2 of them. Stop lights, and head lights.
2, the wire from the key switch to the coil(+) needs to go to a ballast resistor, or, a 12 Volt(internal Ballast resisted) coil.
3, The points must be clean and make a good connection. They must be properly gapped.
4 the horn terminal...is often a relay. It is mounted on the Regulator in many cases.
No I am not attempting to be a hard a$$. I just need to know what the issues are. The above post, with the volts test points open and then closed is good advise. The concern is a 6 Volt coil and no ballast resistor will be a problem. A 12 Volt internal resisted coil will not. There are ways to find out if the coil is working. Again the above post the suggested opening and closing the points is good. You should have a spark when the points open. If the key is on. For those times when a lot of tools are not available, A finger nail will work to pop the points open. If a feeler gauge is not available, a matchbook cover will get the point gap close. If the coil is a 6 Volt unit, it will get hot, and quit after a while. If the coil is a 12 Volt coil and you put a ballast resistor in line with it, well the spark if it works will be weak. A 6 Volt coil will be close to 1.5 Ohms across the + and - connections. A 12 Volt coil will be close to 3 Ohms across the + to - connections. The arithmetic works out to about 4 Amps at the points. if the coil is matched to the Volts. So a 1.5 Ohm ballast resistor will work for a 6 Volt coil in a 12 Volt system. If you use the same resistor in line with a 12 Volt coil, then the current at the points is too low and the coil will not provide a spark. So it matters.
Posted By: jer3545 Re: 54 Chevy no spark no start - Sat Dec 05 2015 11:46 PM
I want to thank you'all for your help with this. My problem has been solved. I never did get'er running but I sold the truck today.
Posted By: Rusty Rod Re: 54 Chevy no spark no start - Sun Dec 06 2015 11:02 PM
that's one way to eliminate a headache... what are you going to buy to replace it?
Posted By: 52Carl Re: 54 Chevy no spark no start - Mon Dec 07 2015 10:01 PM
Rusty brings up a good point!
We nearly had to throw bartamos out of the "club" for going too long without a Stovebolt in possession. (He has since complied).
It is acceptable to at least imply the attempt of looking to secure one in the near future. smile
Carl
Posted By: Rusty Rod Re: 54 Chevy no spark no start - Mon Dec 07 2015 11:58 PM
I don't have a "stovebolt" anymore either... but my Binder has a 327 heartbeat and the Coupe has a 502.
Posted By: 52Carl Re: 54 Chevy no spark no start - Tue Dec 08 2015 01:22 AM
You're in good shape Rusty.
I make it a habit when at car shows, to tell a Furd guy who has a 350 in the engine bay, "Nice Chevy you got there."
Carl
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