Neutral Safety Switch

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Page created by T Jan 7th 2010:

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Column Shift type Neutral Safety Switch as used on HQ, HJ, HX, HZ, LH, LX, WB and UC Holdens. The Switch is in the Park position. Photo by T. Click to Enlargen.

 

==Neutral Safety Switch:==

===Safety:===

The Neutral Safety Switch is used on Cars with Automatic Gearboxes. It permits the Engine to be Cranked only  in Park and Neutral. It is fitted at the base of the Steering Column inside the Car on Column Shift Cars.

On T-Bar (floor shift) models it's screwed onto the Shift Lever and mounted under the Centre Console.

The same Switch is used for both Column and T-Bar Cars, but the Mountings used are different.

The heavier 2 purple Wires for the Starter Solenoid are connected to the middle 2 Contacts.

The right hand pair of Contacts control the Reverse Lights. The middle 2 contacts control the Starter. Photo by T. Click to Enlargen.

The purple Starter Wires connect to the middle 2 contacts. Photo by T. Click to Enlargen.

The T-Bar Switch has different mounting points but the Electrical Connections are the same.   The Switch is in the Park position. Photo by T. Click to Enlargen.
 

===Adjustment:===

The Switch adjustment is done with the Gear Lever in the Neutral position.

Loosen the 2 mounting Screws and position the Switch so that the middle 2 contacts connect when the Gear Lever is in Neutral. Use a Multimeter or a Test Light to confirm. Once done test that the Engine can only be cranked in the Neutral or Park position.

Re-tighthen the Screws.

===Reverse:===

The Reverse Light Switch is built into the Neutral Safety Switch.

The light green and dark green Wires for the Reverse lights are connected to the right hand 2 Contacts.

The dark green Wire comes from the Fuse Panel and the light green Wire goes to the Blinker Switch.

Column Shift type Neutral Safety Switch as used in HZ and UC Holdens. The Switch is in the Park position. Photo by T. Click to Enlargen.

===Manual Cars:===On Manual Floor Shift Cars a different type of Reverse Light Switch is used and it is mounted on the Gearbox.

Manual Gearboxes don't use a Neutral Safety Switch.

===Trimatic and Powerglide Neutral Safety Switches:===

HKTG Powerglide/Trimatic neutral safety switches are the same. Column shift is different to floorshift for all HKTG. HQ column different again.

===Purple Wires:===The Starter Solenoid is controlled by the 2 purple Wires on the Switch. 

===Links:===

Reverse Light Switch 

Dusty's HK-T-G Column Switch Thread

 

===Terms:===

Terms

 

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