 Pertronix 'Ignitor' Module Question, How does one test it's functionality? |
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| euro911 |
 Feb 25 2012, 02:20 PM
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#1
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Retired & living the dream. God help me if I wake up!  Group: Members Posts: 8,851 Joined: 2-December 06 From: So.Cal. & No.AZ (USA) Member No.: 7,300 Region Association: Southern California 
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I just purchased a new 1844 'Ignitor' module. I read the instructions and installed it in the distributor.
I attempted to test the module with a Fluke VOM to verify it provides a pulse. I get a continuous reading of .2387 meg-ohms and the value does not change when the shaft is rotated by hand (yes, magnetic trigger ring is completely seated on the cam shaft). Does the module require 12vDC to see a pulse? ... or is it possible that this module is defective out of the box? (IMG:style_emoticons/default/confused24.gif)  |
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| 914werke |
Feb 25 2012, 08:46 PM
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#2
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"I got blisters on me fingers" Group: Members Posts: 10,156 Joined: 22-March 03 From: USofA Member No.: 453 Region Association: Pacific Northwest
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here is a note I wrote (IMG:style_emoticons/default/smile.gif)
Attached thumbnail(s) 
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| euro911 |
Feb 26 2012, 01:16 AM
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#3
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Retired & living the dream. God help me if I wake up! Group: Members Posts: 8,851 Joined: 2-December 06 From: So.Cal. & No.AZ (USA) Member No.: 7,300 Region Association: Southern California
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So it does need to be powered ... makes sense. I'd like to test it prior to installing on the engine. Thanks, Rich
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| underthetire |
Feb 26 2012, 03:16 PM
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#4
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914 Guru Group: Members Posts: 5,062 Joined: 7-October 08 From: Brentwood Member No.: 9,623 Region Association: Northern California |
It's might be tough to really see with that old fluke. Analog or true rms meters might show up better.
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| euro911 |
Feb 27 2012, 04:17 AM
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#5
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Retired & living the dream. God help me if I wake up! Group: Members Posts: 8,851 Joined: 2-December 06 From: So.Cal. & No.AZ (USA) Member No.: 7,300 Region Association: Southern California
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Hey, don't be ragging on my trusty old Fluke (IMG:style_emoticons/default/slap.gif)
I'll be able to see it pulse if it's rotated slowly (IMG:style_emoticons/default/shades.gif) |
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| 76-914 |
Feb 27 2012, 09:26 AM
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#6
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Repeat Offender & Resident Subaru Antagonist Group: Members Posts: 13,513 Joined: 23-January 09 From: Temecula, CA Member No.: 9,964 Region Association: Southern California
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I agree w/ that test except IIRC, the acceptable drop was 0-3v DC.
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| underthetire |
Feb 27 2012, 09:59 AM
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#7
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914 Guru Group: Members Posts: 5,062 Joined: 7-October 08 From: Brentwood Member No.: 9,623 Region Association: Northern California |
QUOTE(euro911 @ Feb 27 2012, 02:17 AM)  Hey, don't be ragging on my trusty old Fluke (IMG:style_emoticons/default/slap.gif) I'll be able to see it pulse if it's rotated slowly (IMG:style_emoticons/default/shades.gif) er, probably not. There is a minimum speed to trigger the Pert. And that is a old Fluke. Havn't seen one since the late 80's like that (IMG:style_emoticons/default/poke.gif) |
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| Tom |
Feb 27 2012, 10:16 AM
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#8
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Advanced Member Group: Members Posts: 2,139 Joined: 21-August 05 From: Port Orchard, WA 98367 Member No.: 4,626 Region Association: None |
I am certainly no expert, but points work just the opposite of what that test would indicate. You are basically measuring across the switch for voltage/no voltage. With the switch closed = no voltage, switch open = voltage.
When the rotor opens the points you would read voltage and that is when the coil fires. This test would indicate just the opposite.?? Tom http://www.google.com/url?sa=t&rct=j&a...BkzppF8B3AYlg3A Edit: googling found this. |
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| euro911 |
Feb 27 2012, 04:29 PM
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#9
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Retired & living the dream. God help me if I wake up! Group: Members Posts: 8,851 Joined: 2-December 06 From: So.Cal. & No.AZ (USA) Member No.: 7,300 Region Association: Southern California
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Yep, it's actually a late '70's ~ early '80's VOM, but I like it (IMG:style_emoticons/default/smile.gif)
The plan was just to bench test the Pertronix, prior to installing in the car. Looking at Rich's sketch, it appears that with 12v applied to the module, the magnetic ring passing over the module's trigger point should provide a changing continuity reading. I agree that an analog VOM would display pulses better, but rotating by hand slowly should provide verification that the unit works. I don't know for sure (yet), but I can't see rotational speed being an issue (IMG:style_emoticons/default/confused24.gif) ... I'll post my findings later this evening (unless someone else beats me to it) ... |
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| Tom |
Feb 27 2012, 07:21 PM
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#10
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Advanced Member Group: Members Posts: 2,139 Joined: 21-August 05 From: Port Orchard, WA 98367 Member No.: 4,626 Region Association: None |
Mark,
Check step #5 in the link above under negative ground testing. As the magnetic sleeve is rotated around the pick up, the voltage will vary from 12 to 0 volts. Tom |
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| euro911 |
Feb 27 2012, 11:08 PM
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#11
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Retired & living the dream. God help me if I wake up! Group: Members Posts: 8,851 Joined: 2-December 06 From: So.Cal. & No.AZ (USA) Member No.: 7,300 Region Association: Southern California
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Aha (IMG:style_emoticons/default/idea.gif)
Why PerTronix doesn't provide that info with their product is beyond me (IMG:style_emoticons/default/confused24.gif) Thanks for the link, Tom |
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