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1984 GMC Sierra hei distrbutor wiring

Tiny
WILLWAG3
  • MEMBER
  • 1984 GMC SIERRA
Electrical problem
1984 GMC Sierra V8 Two Wheel Drive Automatic

I have a blue wire unhooked coming from bat terminal of distributor. Where does this go?
Monday, July 13th, 2009 AT 8:58 AM

3 Replies

Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Hello, the bat terminal is ignition feed, the wire goes hot when you turn on the key. I thought it was a pink wire?
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Monday, July 13th, 2009 AT 9:16 AM
Tiny
WILLWAG3
  • MEMBER
  • 2 POSTS
No, it`s a light blue wire coming from front of bat terminal, in front of group of wires going in to distributor plug. This has been butchered by previuos owners so I can`t say all colors are correct.
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Monday, July 13th, 2009 AT 9:39 AM
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
On the hei distributors I've looked at, the single terminals are labeled, bat and tach. The bat terminal is ignition feed, goes hot when you turn on the key, primary voltage to the coil, without that, no spark at the plugs. The tach terminal is signal, you can hook a testlite to it, to check for pulse with engine cranking.
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Monday, July 13th, 2009 AT 10:52 AM

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