Re: How to check an AC.Delco coil?
From: Lance Duchesneau (ducaati@gmail.com)
Date: Sat 31 May 2008 - 21:31:30 EDT
Dizzy must be the distributor, correct?
On 5/31/08, pugNZ <pug-yahoo2@azorah.co.nz> wrote:
>
> According to Gregory's Automotive Electrics & Electronics:
> Tests for no-spark problem
> 1.
> Connect test lead (wires with bulb) to ground and battery side of coil,
> light should be on when engine is cranking and when key is in on position.
> If it doesn't light, check primary circuit for high resistance.
>
> 2.
> Measure supply voltake to coil with engine cranking to check the bypass
> circuit is functioning correctly
>
> 3. Measure supply voltage in run position - this will check resistance
> circuit (where used)
>
> 4.
> check coil with ohmmeter-
> connect across two primary terminals, out of spec or infinite reading =
> faulty
> connect between one primary terminal and secondary terminal for continuity
> =
> if no reading coil is open circuit and faulty
> check primary terminal to case, if other than 0 = faulty
>
>
> Coil works by positive power to one primary terminal, earth to other
> (Charges coil).
> Points/ignition module etc breaks earth connection to 2nd primary terminal,
> magnetic field collapses across secondary windings and induces spark.
>
> Seems to me that a simple test of a coil is to undo all the wires, hook
> +side primary to battery +, case to earth, then with wire on -ve primary
> terminal intermittently touch earth while checking for spark from centre
> terminal to earth.
>
> Seems like you are describing the coil/ignition module and resistor?
> From what you are suggesting it seems that perhaps there is too much
> resistance in teh wires from the dizzy to the module and coil and/or the
> module earth is bad? Could also be a pickup fault in the dizzy - you would
> need to take that to an auto sparky.
>
>
>
>
> On 5/31/08, zumkopf <martin.karo@verizon.net> wrote:
> >
> > I've received several tips on checking a coil's function, but they
> > seem to relate to the canister-style coils with one big lead in the
> > center top and two smaller wires/terminals flanking it. My XN6 has
> > the AC/Delco coil, which looks much different.
> >
> > The coil comes as a square unit, with the actual coil at one end and
> > a large rectangular cast box at the other. Going into the box are a
> > green and a red lead that head to the distributor. Coming out the
> > front bottom of the coil, underneath the main lead, there is a single
> > lead going to a small black plastic box unit bolted down next to the
> > coil (I assume that is some sort of resistor). There are two more
> > wires coming out from the coil, one of them (grey) leading to a
> > cylinder-structure about an inch long bolted down on the other side
> > of the coil; another wire (red) comes out of that cylinder and heads
> > somewhere else. The other wire out the front of the coil (brownish)
> > just heads somewhere else. The confusing thing to me is that when I
> > checked the inputs, the white input read 12.5 volts, and the brown
> > wire had 3.5 volts coming in.
> >
> > Are those readings normal? Which lead is the "positive" and which
> > the "negative"? Is white the "high" and brown the "low" input? How
> > do I check to see if the coil is faulty? (as noted, it has power
> > coming in, but does not make spark when cranked. Whether that is due
> > to bad coil, or lack of signal to fire, I don't have the expertise to
> > tell.)
> >
> >
> > ------------------------------------
> >
> > Recommended format for your email subject lines:
> > Model # [Model Letters] Year Subject
> >
> > Examples:
> > 505 88 V6 Mileage
> > 405 Mi16 89 Ignition Coil source?
> >
> > ************************************************
> > To unsubscribe from this list send a blank email message to
> > PEUGEOT-L-UNSUBSCRIBE@YAHOOGROUPS.COM
> > ************************************************
> > Yahoo! Groups Links
> >
> >
> >
> >
>
>
>
> [Non-text portions of this message have been removed]
>
>
>
> ------------------------------------
>
> Recommended format for your email subject lines:
> Model # [Model Letters] Year Subject
>
> Examples:
> 505 88 V6 Mileage
> 405 Mi16 89 Ignition Coil source?
>
> ************************************************
> To unsubscribe from this list send a blank email message to
> PEUGEOT-L-UNSUBSCRIBE@YAHOOGROUPS.COM
> ************************************************
> Yahoo! Groups Links
>
>
>
>
-- Lance[Non-text portions of this message have been removed]
------------------------------------
Recommended format for your email subject lines: Model # [Model Letters] Year Subject
Examples: 505 88 V6 Mileage 405 Mi16 89 Ignition Coil source?
************************************************ To unsubscribe from this list send a blank email message to PEUGEOT-L-UNSUBSCRIBE@YAHOOGROUPS.COM ************************************************ Yahoo! Groups Links
<*> To visit your group on the web, go to: http://groups.yahoo.com/group/peugeot-L/
<*> Your email settings:
This archive was generated by hypermail 2.1.4 : Sat 31 May 2008 - 20:46:33 EDT