Engine Alarm not working.

[PuppyR]

OK. Help needed. Ford Lehman 120: My engine alarm stopped working so I ordered and replaced the high temperature alarm sensor and low oil pressure alarm sensor from American Diesel. Replaced both and alarm sounded. After a short trip, 3 or 4 hours, stopped engine and no alarm. If I ground out either sensor the alarm sounds. If I ground out the main wire running from the sensor to the alarm the alarm sounds.. Replaced new sensor with old one and still no alarm. Ideas please?

 

[catalinajack]

Hard to know but since you have a new sender and you have tested it, the problem is likely in the wire from the sender to your alarm. Run a new wire. If that is difficult run a temporary wire as a test of the existing wire.

OK. Help needed. Ford Lehman 120: My engine alarm stopped working so I ordered and replaced the high temperature alarm sensor and low oil pressure alarm sensor from American Diesel. Replaced both and alarm sounded. After a short trip, 3 or 4 hours, stopped engine and no alarm. If I ground out either sensor the alarm sounds. If I ground out the main wire running from the sensor to the alarm the alarm sounds.. Replaced new sensor with old one and still no alarm. Ideas please?