An easy test on the primary ignition circuit (points /condensor).
Test for input to the coil with your test light (I assume you have an early tractor, 6 volt positive battery ground) on the Negitive side terminal of the coil, the light should light and stay that way even when cranking the engine. If this is good then go to next step, if not check to see why you are losing power to the coil (bad connection?)
Next go to the Positive terminal (the wire going to the points) The light should go on and off as you are cranking the engine. The light will come on when the points are open (circuit is open) and the light will go off when the points are closed (direct circuit to ground, no power is left to light the test light).
If the light stays on then the points are not closing (direct circuit to ground) if the light does not light then the points are remaining closed or the ciruit /wiring is going direct to ground.
Repeat test and make corrections until the light flashes on and off (wire going to points) as you crank the engine. When the light goes off and on the coil will provide secondary spark to the spark plugs, check to see if you have spark out of the coil at this point.
Good Luck and post back with your results
Mark
How To Test Points
-
- 10+ Years
- Posts: 556
- Joined: Sun Jan 04, 2009 5:41 pm
- Zip Code: 49265
- Tractors Owned: 1938 John Deere A
(owned 38 years)
1953 Cub
(owned 21 Years)
1963 Olds Cutlass
1970 Ford F-350
(Cub Hauler) - Location: MI Onsted
How To Test Points
Experiance is knowing what NOT to do the next time.......
1937 John Deere A (Big John)
1953 Farmall Cub (LiL Red)
Lots of projects.
1937 John Deere A (Big John)
1953 Farmall Cub (LiL Red)
Lots of projects.
-
- Similar Topics
- Replies
- Views
- Last post
-
- 6
- 280
-
by John *.?-!.* cub owner
Thu Jun 09, 2022 10:36 pm
-
- 5
- 730
-
by Eugene
Thu Feb 20, 2020 6:47 am
-
-
184 new points Attachment(s)
by rednax » Sat Dec 05, 2020 11:23 am » in Lo-Boy Series - 154, 184, 185 - 16
- 1064
-
by SONNY
Sat Jun 19, 2021 11:49 am
-
-
- 2
- 598
-
by BigBill
Sun Jul 14, 2019 4:38 pm
-
- 10
- 1037
-
by JerryM
Sat Jul 27, 2019 10:50 am
Return to “Ignition/Electrical”
Who is online
Users browsing this forum: No registered users and 0 guests