Switched power from AIR pump ??
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Switched power from AIR pump ??
Hi..
I´m about to finalize my 383 LT1 build (http://thomas-chevy-c4.blogspot.no/) and last to do are :
1. Get switched 12v to fan new gear oil cooler. The fan is 5 amp max.
2. Convert to heated O2 sensors..
The AIS (air injection system) is removed and my plan is to connect fan and O2 sensors to the 20 amp power from air pump..The tune for the car is done by PCM4less and AIS is removed from the tune..
Question is : I have measured the volt on the air pump relay and I have 12v on two of the four connections (se picture below). I dont know which one to use?
The middle of the three contacts ("left row" in contact) is constant 12v. I suppose I can use the other 12v which I assume is switched or is that only power to control the air pump relay? Kind of tricky to find a "unused" 12v switched power...
I´m about to finalize my 383 LT1 build (http://thomas-chevy-c4.blogspot.no/) and last to do are :
1. Get switched 12v to fan new gear oil cooler. The fan is 5 amp max.
2. Convert to heated O2 sensors..
The AIS (air injection system) is removed and my plan is to connect fan and O2 sensors to the 20 amp power from air pump..The tune for the car is done by PCM4less and AIS is removed from the tune..
Question is : I have measured the volt on the air pump relay and I have 12v on two of the four connections (se picture below). I dont know which one to use?
The middle of the three contacts ("left row" in contact) is constant 12v. I suppose I can use the other 12v which I assume is switched or is that only power to control the air pump relay? Kind of tricky to find a "unused" 12v switched power...
Last edited by thomasev; Jun 17, 2012 at 08:36 AM.
Drifting
Joined: Nov 2009
Posts: 1,341
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From: Perth Western Australia
St. Jude Donor '10
As the "Air Pump Relay" and the "Air Bypass Valve" are now redundant you can use either the switched wire to terminal D on the "Air Pump Relay" or the switched wire to terminal A on the "Air Bypass Valve".
The 20 A circuit is not switched and cannot therefore be used.
The 20 A circuit is not switched and cannot therefore be used.
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Very best regards,
Thomas
