[DMCForum] Re: Electrical gremlin... no power at coil
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[DMCForum] Re: Electrical gremlin... no power at coil



Oooh, just found JPG of wiring diagram on my office machine (sure hope
my GM never walks in on me when I'm doing this). Not much help --
ignition module ground is black, duh -- but may come in handy in future...

Module is behind driver's seat, under evil demon infested bowels from
the depths idle speed ECU (sorry, couldn't resist). Find black wire
there and run a temporary one to something like seat belt bolt (my
personal favorite known good ground). Don't know if you can use metal
cage itself. Seem to remember cage on relay side isn't grounded.

What exactly is ranking of DeLo Achilles Heels?
-Electrical grounds
-Cooling system
-Fuel delivery
-Factory stereo

Bill Robertson
#5939

>--- In DMCForum@xxxxxxxxxxxxxxx, Travis Goodwin <tgoodwin@xxxx> wrote:
> > Don't have car or tech manual at office, so don't quote me on wire
colors:
> 
> HOW DARE YOU! Always keep the manual by your side. I plan to make a
small
> version like to contact Gideons International and have them create a
pocket
> sized version of the manual like they did with the Bible.
> 
> > Line into coil (+) should be 8-10 volts. Full 12 volts would
> > eventually barbeque ignition module, but is OK to jump temporarily to
> > start car. That's whole purpose of resistor network and start relay.
> 
> That's about right. I did jump the transistor just to see what might
happen
> and I got the same result.
> 
> > Can't remember exactly how much lower, but coil ground (-) is less
> > than input. Remember that it's still hot at this point (actual ground
> > inside ignition module).
> 
> It should be around 6-8V. I read 7V on it when I ran a wire from the
left
> side of the coil to the engine block. Does this indicate possible ground
> fault?
>  
> > Use Ohm setting on meter to test coil itself. Bosch is some fantastic
> > number in the thousands (9,000?). My Pertronix is 1.5 I think.
> 
> I actually replaced the coil outright with a brand new one. Same result.
>  
> > Test for HT with timing light on coil output, or old fashioned gound
> > to block test (that one still scares me. Shocked ever living mess out
> > of myself once. Have no desire to do twice).
> 
> I did this as well. Tried it with the coil wire and got nothing.
Then I ran
> a jumper wire to the block and looked for spark. Nothing. Not even a
burp.
> 
> > If your voltages are correct, coil is good, but no HT, ignition module
> > may be bad OR MAY HAVE LOST GROUND. Before declaring module hopeless,
> > run temporary known good ground. All 5 of my Lincolns have new ground
> > wires due to design flaw. DeLo may be comparable. Remember: it IS a
> > plastic car...
> 
> Where is the ground for the ECU?
> 
> > Oh, you could have distributor problem. Make sure sensor wire to
> > ignition module plugged in. Don't know how many volts it carries, but
> > should see some sort of reading if you pierce insulation. Didn't
> > forget to put rotor button back in?
> 
> Yep, she's plugged in. According to John H's site, the pulse coil
connection
> should have 600 ohms on it. I need to check this as well.
>  
> > Bill Robertson
> > #5939
> > 
> > >--- In DMCForum@xxxxxxxxxxxxxxx, Travis Goodwin <tgoodwin@xxxx>
wrote:
> > > No spark = no start.
> > >
> > > I traced it back to the coil. I tried a new one just to be sure but
> > it was
> > > fruitless. Then I checked all the fuses. Everything's ok.
> > >
> > > When I go to start the car I am assuming I should have 12V across
> > the coil,
> > > which I do not at the moment. I checked voltage on the right
side. The
> > > voltage from the resistor is ok and I have continuity and ground
to the
> > > capacitor. The trouble seems to be on the left side. I've got
> > nothing coming
> > > from the White/Slate wire that leads to the ignition control
behind the
> > > driver's seat.
> > >
> > > What are the conditions required to get power to that side of
the coil?
> > > Maybe I'm misunderstanding something altogether. Can anyone shed
> > some light
> > > on this puzzler?
> > 
> > 
> > 
> > To unsubscribe from this group, send an email to:
> > DMCForum-unsubscribe@xxxxxxxxxxxxxxx
> > 
> > 
> > 
> > Your use of Yahoo! Groups is subject to
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