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Author Topic: Unk pressure switch  (Read 2570 times)

Offline Fairlane514

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Unk pressure switch
« on: June 01, 2015, 10:07:48 am »
85 C10…..There is a pressure switch on the power steering hard line that is mounted to the front drivers side frame horn.  What is its function?


Thanks
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Offline bd

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Re: Unk pressure switch
« Reply #1 on: June 01, 2015, 11:22:22 am »
The switch provides feedback to the engine ECM when the steering is heavily loaded (generally full lock) to assist with idle speed management.
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Rich
It's difficult to know just how much you don't know until you know it.
In other words... if people learn by making mistakes, by now I should know just about everything!!!
87 R10 Silverado Fleetside 355 MPFI 700R4 3.42 Locker (aka Rusty, aka Mater)

Offline Fairlane514

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Re: Unk pressure switch
« Reply #2 on: June 01, 2015, 12:57:33 pm »
Thanks, Rich…..The original distributor is no longer in this particular truck, so I guess the switch is not needed
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Offline bd

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Re: Unk pressure switch
« Reply #3 on: June 01, 2015, 01:18:07 pm »
I've never encountered that switch in service, so I don't know how much, if any, the effect will be if it's removed.  Until you questioned it, I actually thought they were used only on 6 cylinder applications.
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Rich
It's difficult to know just how much you don't know until you know it.
In other words... if people learn by making mistakes, by now I should know just about everything!!!
87 R10 Silverado Fleetside 355 MPFI 700R4 3.42 Locker (aka Rusty, aka Mater)

Offline Fairlane514

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Re: Unk pressure switch
« Reply #4 on: June 01, 2015, 02:01:15 pm »
This is a 85 Custom Deluxe, V8 truck……I have never seen one before. Its unplugged now, didn't seem to effect the operation.
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