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4JB1 (marinised) Glow Plug wiring / relay

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4JB1 (marinised) Glow Plug wiring / relay

Postby Victorthesailor » Sun May 27, 2018 3:11 pm

I have a marinised 4JB1 in my 1992 yacht recently purchased. I replaced the glow plugs today going through the motions of fault finding excessive fuel-rich white smoke. I realized that they are not terminated to a positive wire whatsoever. There is a glow plug plate that connects the glow plugs in series but its not fed my anything.

New Zealand gets real cold in the winter so glow plugs are required. I'm not an auto electrician so any help by way of photos or 'sketches for dummies' will be very much appreciated.

I've attached a image of the glow plug plate from the service manual (the manual does not show me what this should be connected to)

Thanks in advance.
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Re: 4JB1 (marinised) Glow Plug wiring / relay

Postby geeves » Sun May 27, 2018 4:29 pm

A non standard setup and an engine that doesnt really care about glow plugs. The normal set up gives 0.5 seconds of glow unless the coolant is below 5C in which case it gives 30 seconds.Also timing is advanced while this low temperature exists. You very likely dont have the wiring loom to wire like factory but auto shops do sell glow plug timers aftermarket which activate via a switch. You could set this up and just remember at winter time you need to push the switch. (really you only need it on very cold Auckland winter days which you might not be using the boat anyway)
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