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Point type Ignition Flow Chart

Point type Ignition Flow Chart. Auto 2 Trouble Shooting. Fixing something that is broken. How can you fix something efficiently if you don’t even know how it is broken? To troubleshoot something that doesn’t work correctly you need: To know how it is suppose to work

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Point type Ignition Flow Chart

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  1. Point type Ignition Flow Chart Auto 2 Trouble Shooting VHS Auto

  2. VHS Auto

  3. Fixing something that is broken • How can you fix something efficiently if you don’t even know how it is broken? • To troubleshoot something that doesn’t work correctly you need: • To know how it is suppose to work • The basics of how it works • Critical thinking comparing what isn’t working to how it is suppose to work • A logical process to eliminate the possible causes of the problem • Proper tools VHS Auto

  4. Trouble shooting • If you had never seen an apple, never read about an apple, and no one had ever told you anything about an apple, it would very difficult for you to tell me what is wrong with these apples. VHS Auto

  5. Trouble shooting • It would even be more difficult for you to tell me how to fix what is wrong with these apples VHS Auto

  6. Trouble shooting for no spark • In the same way, if you haven’t learned how we make spark in the ignition system, it will be very difficult for you to figure out why an engine doesn’t have spark • If you don’t know the basics of electricity, it will be very difficult for you to diagnose what is wrong • If you don’t know how to use test equipment, it will be very difficult for you to find your problem VHS Auto

  7. Logical testing & elimination • Hopefully you learned by now: • How the primary ignition system works to make spark • Basic rules to series and parallel circuits and can apply the knowledge • How to select the proper electrical measuring tools and how to use them • So now we need to learn how to use a process of elimination to diagnose a vehicle that doesn’t have spark VHS Auto

  8. There is usually more that one right way to fix something • The flow chart I have made for point type ignition is just the way that is logical and works efficiently for me • By no means is it the only way • Since we don’t have a lot of experience yet with diagnosis, lets use my method for logically eliminating all the causes of an ignition system that is not working correctly VHS Auto

  9. Primary Ignition • We had better know by now: • Key on, points on, primary current flows and creates a magnetic field around primary winding of coil • Points open, magnetic field crashes inducing high voltage into secondary winding creating spark VHS Auto

  10. Draw primary ignition on back of flow chart fairly large RUN - + - + VHS Auto

  11. Checking Conventional Ignition Systems Is there spark from coil wire while cranking? VHS Auto

  12. Using remote starter to crank B+ S VHS Auto

  13. Make sure you are checking at the proper end of wire VHS Auto

  14. Primary ignition circuit RUN - + - + VHS Auto

  15. Checking Conventional Ignition Systems Is there spark from coil wire while cranking? NO With key on, Is There power to “+” Side of coil? VHS Auto

  16. Primary ignition circuit RUN - + - + VHS Auto

  17. VHS Auto

  18. Making sure test light works VHS Auto

  19. Points open Points closed VHS Auto

  20. Primary ignition circuit RUN - + - + If we didn’t have power to “+” side of coil, what would be the causes? VHS Auto

  21. Checking Conventional Ignition Systems Is there spark from coil wire while cranking? NO With key on, Is There power to “+” Side of coil? NO Ballast resistor, wiring to “+” side of coil or ign switch is open VHS Auto

  22. Primary ignition circuit RUN - + - + If you have power to coil positive Then you know this side of circuit Is doing it’s job and we can move on What should we Check next ? VHS Auto

  23. Checking Conventional Ignition Systems Is there spark from coil wire while cranking? NO With key on, Is There power to “+” Side of coil? YES NO Is there power to the “-” side of coil key on? Ballast resistor, wiring to “+” side of coil or ign switch is open VHS Auto

  24. Primary ignition circuit RUN - + - + VHS Auto

  25. Must have primary wires for coil hooked up VHS Auto

  26. Checking Conventional Ignition Systems Is there spark from coil wire while cranking? NO With key on, Is There power to “+” Side of coil? YES NO Is there power to the “-” side of coil key on? Ballast resistor, wiring to “+” side of coil or ign switch is open NO Crank engine, does test light blink on “-” side of coil VHS Auto

  27. Primary ignition circuit RUN - + - + When we crank the engine What should the points do? VHS Auto

  28. Must have primary wires for coil hooked up CRANK CRANK CRANK CRANK CRANK CRANK CRANK CRANK VHS Auto

  29. Checking Conventional Ignition Systems Is there spark from coil wire while cranking? NO With key on, Is There power to “+” Side of coil? YES NO Is there power to the “-” side of coil key on? Ballast resistor, wiring to “+” side of coil or ign switch is open STAYS OFF (NO VOLTAGE) NO Crank engine, does test light blink on “-” side of coil NO VHS Auto

  30. Primary ignition circuit RUN - + - + So while cranking the engine The light stays off How much voltage should be left on the “-” side of Coil with the points closed and current flowing? How much voltage should be on the “-” side of Coil with the points open? VHS Auto

  31. Write on back of flow chart • With voltage to “+” side of coil, there are only four things that will cause no voltage to “-” side of coil while cranking (light stays off) 1. Points always closed VHS Auto

  32. Primary ignition circuit RUN - + - + What else would cause The light to stay off? VHS Auto

  33. Write on back of flow chart • With voltage to “+” side of coil there are only four things that will cause no voltage to “-” side of coil while cranking (light stays off) 1. Points always closed 2. Open or grounded primary winding in coil VHS Auto

  34. Open Primary winding Don’t forget to isolate one side of the coil VHS Auto

  35. Primary ignition circuit RUN - + - + What else would cause The light to stay off? VHS Auto

  36. Write on back of flow chart • With voltage to “+” side of coil there are only four things that will cause no voltage to “-” side of coil while cranking (light stays off) 1. Points always closed 2. Open or grounded primary winding in coil 3. Grounded condenser VHS Auto

  37. Grounded condenser VHS Auto

  38. Checking a good condenser It will charge up and go to infinite resistance. VHS Auto

  39. Write on back of flow chart • With voltage to “+” side of coil there are only four things that will cause no voltage to “-” side of coil while cranking (light stays off) 1. Points always closed 2. Open or grounded primary winding in coil 3. Grounded condenser 4. Grounded wire between coil “-” and points VHS Auto

  40. Shorted primary wire to ground VHS Auto

  41. Crank engine, does test light blink on “-” side of coil NO Checking Conventional Ignition Systems Is there spark while cranking? NO With key on, Is There power to “+” Side of coil? YES NO Is there power to the “-” side of coil key on? Ballast resistor, wiring to “+” side of coil or ign switch is open NO Let’s continue on VHS Auto

  42. Crank engine, does test light blink on “-” side of coil NO VHS Auto

  43. Crank engine, does test light blink on “-” side of coil NO Are points always staying closed? LOOK VHS Auto

  44. Crank engine, does test light blink on “-” side of coil NO Are points always staying closed? LOOK YES NO Adjust Dwell Do coil test VHS Auto

  45. Crank engine, does test light blink on “-” side of coil NO Are points always staying closed? LOOK YES NO Adjust Dwell Do coil test GOOD BAD Replace Check for a grounded condenser VHS Auto

  46. Crank engine, does test light blink on “-” side of coil NO Are points always staying closed? LOOK YES NO Adjust Dwell Do coil test GOOD BAD Replace Check for a grounded condenser GOOD BAD Replace Primary wire between “-” side of coil and points is grounded Repair VHS Auto

  47. #1 #2 #3 Crank engine, does test light blink on “-” side of coil #4 NO That takes care of The staying off side Are points always staying closed? LOOK YES NO Adjust Dwell Do coil test GOOD BAD Replace Check for a grounded condenser GOOD BAD Replace Primary wire between “-” side of coil and points is grounded Repair VHS Auto

  48. Crank engine, does test light blink on “-” side of coil NO Are points always staying closed? LOOK YES NO Adjust Dwell Do coil test GOOD BAD Replace Check for a grounded condenser Let’s go the Other way GOOD BAD Replace Primary wire between “-” side of coil and points is grounded Repair VHS Auto

  49. Checking Conventional Ignition Systems Is there spark while cranking? NO With key on, Is There power to “+” Side of coil? YES NO Is there power to the “-” side of coil key on? Ballast resistor, wiring to “+” side of coil or ign switch is open VHS Auto

  50. Primary ignition circuit Is there power to the “-” side of coil key on? RUN - + - + VHS Auto

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