Differences

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--- projects:challenger604:boostpumpswitchtroubleshooting [2022/09/14 01:26]
dwheele [Challenger 605 Fuel Distribution Schematic]
+++ projects:challenger604:boostpumpswitchtroubleshooting [2022/09/14 05:21] (current)
dwheele [Conclusion]
@@ Line 9: / Line 9: @@
   * Don has a spare relay on hand
   * Replacement pump costs $9000
-  * Don bought replacement switch 9/11/2022
+  * Don bought replacement switch 9/11/2022, to be delivered to Duncan, who will install it.
+===== Conclusion ======
+We removed the fuel assembly in the cockpit, and measured ohms between pin underscore-C and underscore-D. On the Right Hand Fuel Boost Switch, it measured about 600 ohms and the same spot on the LH switch it measured about 16 ohms. As a comparison, we measured other contacts, such as B to underscore-Z, and it measured 0.5 ohms.
+It appears that indeed the **RH Fuel Boost Switch needs to be replaced, and the LH switch should also be replaced.** This agrees with Don's input that the LH switch did cause one failure, but otherwise the RH switch had the faulty result.
@@ Line 52: / Line 58: @@
 I don't know how hard it is to get to the back of that switch so I can measure.
+------------
+It turns out that to measure between CC and CNO, it is required to measured at the nearby Canon plug underscore-c to underscore-d.
 ===== Information ======

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