Ignition Coil

Tiny
CHIC ISLES
  • MEMBER
  • 1991 DODGE VAN
  • 5.2L
  • V8
  • 2WD
  • AUTOMATIC
  • 130,000 MILES
12 volts positive is not reaching the ignition coil, no spark.
Tuesday, December 21st, 2021 AT 10:08 AM

3 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,747 POSTS
Hi,

First, I attached a wiring schematic I was able to find below. Here is what I need you to check. First, make sure there is power to the engine controller (pin 3) red wire. That power is provided via a fusible link. (See schematic).

If that is good, then we need to check for power at the ASD (automatic shutdown) relay. Power to the relay (power side for coil) is via the same red wire. When the relay is actuated, power is transmitted through the gray wire running to the + side of the coil. The Auto Shutdown (ASD) Relay is located in the engine compartment near the 50-way bulkhead connector. See pic 2 below

Let me know what you find or if you have other questions. Here is a link that you may find helpful as well:

https://www.2carpros.com/articles/how-to-check-wiring

Take care,

Joe

See pic below.
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Tuesday, December 21st, 2021 AT 6:22 PM
Tiny
CHIC ISLES
  • MEMBER
  • 2 POSTS
Many thanks for your prompt reply, I will let you know what I find. Across the pond in Scotland.
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Wednesday, December 22nd, 2021 AT 3:45 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,747 POSTS
Hi,

You are very welcome. Let me know what is found.

Take care and best wishes to both you and Scotland for a great Christmas. I always wanted to visit there. Maybe someday.

Joe
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Wednesday, December 22nd, 2021 AT 5:03 PM

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