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TECHNICAL MOTOBRICK WRENCHING In Remembrance of Inge K. => The Motobrick Workshop => Topic started by: JPaganel on May 14, 2019, 01:38:29 PM

Title: Raging against the dying of the neutral light
Post by: JPaganel on May 14, 2019, 01:38:29 PM

My neutral light started to flicker and periodically goes out completely. When that happens, I need to pull in clutch to start.

So, is it likely the switch or the stuff inside the dash?

The gear indicator LCD is long dead, so I can't use it to compare. I'm assuming there is only one switch on the brick that controls all of this? My boxer has a separate GPI and neutral switch, but I'm pretty sure it's an oddity.

Title: Re: Raging against the dying of the neutral light
Post by: rbm on May 14, 2019, 07:27:25 PM

Most likely the TGP switch on the transmission.

The TGP switch uses a Binary Coded Decimal (BCD) encoding to determine the current gear number.  There are three wires that encode up to eight gear numbers.  When the gear number is zero (i.e. transmission in neutral), all of the three wires are connected to ground.

you could verify the operation of the neutral detect / start enable circuit inside the cluster by disconnecting the TGP switch at the harness and grounding all three yellow wires.  That will simulate neutral.  The neutral indicator on the dash should illuminate.

Title: Re: Raging against the dying of the neutral light
Post by: Laitch on May 15, 2019, 05:07:40 PM

When Neutral's hope is hidden from our sight,
We use our clutch then, in our simple way,
Rage, rage against the dying of the light.

Title: Re: Raging against the dying of the neutral light
Post by: billday on May 16, 2019, 08:54:41 PM

All these years I figured I was the only English major in this joint.

Title: Re: Raging against the dying of the neutral light
Post by: JPaganel on May 17, 2019, 12:24:24 PM

Heh