Left rear stop signal not working
#1
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#4
Sounds like it may either be your brake switch or your multi function switch.
Here's a link I found that may help;
https://www.ford-trucks.com/forums/8...t-working.html
Here's a link I found that may help;
https://www.ford-trucks.com/forums/8...t-working.html
#5
Sounds like it may either be your brake switch
or your multi function switch.
To test I simply turned the signal on and tested it with a meter. 5 volts at the plug, 5 volts at relay 202 I am pretty stumped on this.
Pull the covers off the column and inspect the connectors at the MFS paying particular attention to the LG/OG wire on connector C202b (12-pin connector). Check voltage on that pin by back-probing it while you have your foot on the brake. If it doesn't read battery voltage, check the OG/LB wire on the same connector (that's the rt side stop/turn lamp) as a comparison. If the right side is good (battery voltage) but the left side isn't when measured at the connector, you have a bad MFS (most likely). Check the pin seating and the condition of the suspect pins before buying a new switch.
#6
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#8
#9
wiring diagram if you have a fireside bed the socket is grounded but a standard bed there should be a
terminated ground wire. I would try running a temp ground wire to the socket to see if that fixes it and if it does then you know to look for a bad ground on that side.
#11
You have a high resistance in the circuit (not the ground). It could be in the MFS (Burned contact, for example) or anywhere in the wiring harness (corroded connector, for example) back to the bulb.
That's because the bulb requires far more current than does a voltmeter. A high impedance digital meter requires almost not current at all (a few microamps, perhaps) while the bulb may require several hundred milliamps or more.
Did you ever follow the explicit directions I gave you almost a month ago to measure at the MFS?
I can apply the brake and get 12v at the socket with a meter but a test light or bulb won't light up.
Did you ever follow the explicit directions I gave you almost a month ago to measure at the MFS?
#12
Ok fixed it was the multi function switch.
Thanks for all the help!
oh no not working again. I am going to try running a new wire from front to back.
I tested battery voltage then gr-bl vs og-br with the brake applied at the mfs and it's good, at the rear connecter by the bumper the left side is down slightly 12.4 vs 11.89. I am assuming that's a problem
Project089 thanks for the advice
Thanks for all the help!
oh no not working again. I am going to try running a new wire from front to back.
I tested battery voltage then gr-bl vs og-br with the brake applied at the mfs and it's good, at the rear connecter by the bumper the left side is down slightly 12.4 vs 11.89. I am assuming that's a problem
Project089 thanks for the advice
Last edited by Aaron Lyons; 08-30-2017 at 11:11 PM. Reason: Not fixed!!
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