Relay Indicator?
#1
Relay Indicator?
I have asked this question of Ford Parts and have yet to receive an answer; What is the white opaque area on the top of the 20 A FoMoCo 5M5T-14B089-AA relay? Is this an indicator that the relay is defective or blown?
#5
I'm asking because I am curious, and when a car doesn't start, it would be nice if the relay "indicates" that the fuel circuit is the problem, i.e. a defective fuel pump and/or because of inadequate pressure.
Last edited by Jammer; 11-20-2021 at 08:21 AM.
#6
Believe it or not, relays don't usually give much trouble.
They just "relay "the command/signal from the point of origin to the component.
Unfortunately, they haven't invented the tool to tell us exactly what is wrong , how to fix it and actually do the work. Maybe , someday.
They do help us by providing a code many times that ONLY tells us what system has a problem. It still requires some knowledgeable info of how the system is supposed to work and how to check for malfunctions. Sometimes it can get a bit complicated.
They just "relay "the command/signal from the point of origin to the component.
Unfortunately, they haven't invented the tool to tell us exactly what is wrong , how to fix it and actually do the work. Maybe , someday.
They do help us by providing a code many times that ONLY tells us what system has a problem. It still requires some knowledgeable info of how the system is supposed to work and how to check for malfunctions. Sometimes it can get a bit complicated.
#7
Relay Changed Because Fuel Pump Defective
I replaced the original Ford relay because after overhauling the engine the car wouldn't turn over. I knew I had spark because I replaced the components that produce spark (battery, coil pack, plugs, wires, etc.). Thinking fuel pump, I replaced the relay and, voilą, it started! It ran for a few hundred miles until, one day, it stopped IN THE MIDDLE of an intersection! Apparently the fuel pump was only intermittently supplying adequate pressure, and changing the relay was coincidental. I later tested the original relay and it tested good, however, if the original relay would have had a "good-bad" indicator (or possibly a window indicating status), then I would have known it was not the relay but an intermittent fuel pump. That's the reason for my question regarding the opaque window on the replacement relay.
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