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Main : Misc : Tech Section Brake line pressure differential Warning Light Switch

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Brake line pressure differential Warning Light Switch
Brake line pressure differential Warning Light SwitchPopular
SubmitterddgonzalMore Photos from ddgonzal   Last Update2005/12/24 18:49    Tell a friendTell a friend
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Datsun 1200 LHD disk brake model. From the north american factory manual.

A warning light is located on the instrument panel to warn the driver when a pressure difference of 13 to 17 kg/cm2 (185 to 242 lb/sq in) exists between the front and rear brake systems.

A hydraulically actuated warning light switch is located in the engine compartment. Both front and rear brake systems are connected to the switch assembly.

When a pressure difference of 13 to 17 kg/cm2 (185 to 242 lb/sq in) occursbetween the front and rear brake systems, the valves will shuttle toward the side with the low pressure. The valve contacts with the switch terminal, the ground circuit for the warning light is completed, and thus the warning light lights.

In this case, correct the hydraulic brake problem and bleed the brakes.

Check the warning light switch assembly for a proper operation. Check the switch assembly for luid leakage.

NOTE: Do not attempt to repair switch for any reason: replace switch assembly completely.

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