Toyota 42-6FGCU25:
1998 4Y gas/propane engine Check Connector

One of the two leads going to the Ignition Check Connector is broken.
The black/yellow lead is spliced into the black/yellow wire running from the distributor to the rev switch. The other lead is black/2 orange stripes(rings) and is broken. I opened up the harness and I cannot find where it broke off from. Anyone know?

Toyota wiring diagrams do not show the Check Connector though their service manual asks you to disconnect the check connector when setting timing. Is the Check Connector strictly for feeding a tach signal to a tachometer or does it have another purpose?
  • Posted 11 Jan 2015 08:14
  • Discussion started by Georg
  • Ontario, Canada
1998 426FGCU25 Ser No 67740
Showing items 1 - 4 of 4 results.
That is the right connector, it sits barely outside the harness, along the metal rail. One of the two wires coming to the connector is spliced into the bk/y wire coming from the distributor and the splice looks factory on my truck, not something added on later.

The Factory Service Manual refers to this connector in the section on ignition timing. It asks you to unplug apart the connector before timing the engine.
  • Posted 12 Jan 2015 00:26
  • Reply by Georg
  • Ontario, Canada
1998 426FGCU25 Ser No 67740
If I remember right, that plastic connector sits barely outside the harness, along the metal rail that holds the wire harness. It doesn't plug in anywhere or splice anywhere.
  • Posted 11 Jan 2015 15:08
  • Reply by Hero5
  • South Carolina, United States
Take care of the customer
The Check Connector is in the main wiring harness, right above the distributor, about five inches above it. It is just above the oil dipstick. There are two wires going to the distributor, one of them being black/yellow stripe, going from the distributor to the rev switch. One half of this Check Connector is spliced into this wire. I have a photo of this check connector but this forum will not let me post a link to it on Photobucket. Perhaps you can search for it on Photobucket under george7941.

The terminals on this connector are the round bullet terminals, typically used by Grote for their truck lights. These terminals are larger than Weatherpack terminals. There is a translucent plastic cover over this connector.
  • Posted 11 Jan 2015 14:26
  • Modified 11 Jan 2015 14:30 by poster
  • Reply by Georg
  • Ontario, Canada
1998 426FGCU25 Ser No 67740
Where is the check connector you are referring to?
  • Posted 11 Jan 2015 12:32
  • Reply by Hero5
  • South Carolina, United States
Take care of the customer

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