Temp Volt Oil Alarm Adjustment
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Category: Repairs and Maintenance
Forum Name: Boat Maintenance
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URL: http://www.CorrectCraftFan.com/forum/forum_posts.asp?TID=17468
Printed Date: November-22-2024 at 5:24pm
Topic: Temp Volt Oil Alarm Adjustment
Posted By: Hawktique
Subject: Temp Volt Oil Alarm Adjustment
Date Posted: May-10-2010 at 3:53am
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Here is a picture of my '90. Hope it helps. I just finished with adjusting my module for the voltage alarm. Let me know if you need any clarification. You can adjust the low parameter for the alarms with R1,2 or 3. The IC compares the signal voltages to the voltages adjusted by the resistors to energize the corrisponding transistor, which applies the emmiter signal (in this case the ground)to the associated warning. Here is a breakdown of the module wiring.
Purple-12V hot, black-chassis ground, Orange-ground signal for the audible alarm WHT/BLK ground signal for Temp Light Lt BLU/WHT ground signal for Oil Press Light PRPL/WHT ground signal for Voltage Light WHT/BRN-Temp signal voltage (Adjust R1) Lt BLUE-Oil signal voltage (Adjust R2) Voltage alarm (Adjust R3) 
This is the IC NTE 987 which is the brains of the module. 
The schematic below was taken from a post by Lewy2001.  ------------- "A Veteran is someone who at one point in his life, wrote a blank check made payable to: 'The United States of America,' for an amount of 'up to, and including his life." Semper Fi |