[DML] Unprotected DeLorean Ignition Circuit
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[DML] Unprotected DeLorean Ignition Circuit



I've pretty much given up on the DML, but Farrar apparently posted his
recent distributor melt down over here, and received much speculation
that it was caused by his conversion to carburetion.

And so I'm back....

If the DeLorean wiring diagram is correct, I humbly suggest that
Farrar's meltdown was ultimately caused by the fact that the entire
ignition circuit is absolutely, totally, 100%, completely unprotected
by so much as a single fuse, circuit breaker, or fusible link.
Obviously there had to be a precipitating event, but we may never be
able to figure out what that event was. It could have been as simple
as a crack in the distributor cap.

Note that the ignition circuit has multiple points to ground:
- Stock bracket that the ballast resistors attach to is grounded (my
home made stainless bracket is 100% isolated BTW)
- Bracket the coil mounts to is grounded
- Engine itself is of course grounded, which grounds the distributor,
wires, and plugs

If Farrar had so much as a crack in his wire insulation, that would
ground without protection.

I am often chastised for suggesting that DeLoreans are less than
optimally engineered. I humbly offer their totally unprotected
ignition circuits in my defense.

And as soon as possible I will be adding a fusible link to my own
ignition circuit.

BTW: Fuse #1 includes "distributor" among its many functions. Either
the fuse panel is wrong, or the wiring diagram is wrong.

I will go away now and leave you fine people alone (I can be found on
another well known online forum if necessary).

Bill Robertson
#5939






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