Disable Backup Beeping?

markboris

Well-Known Member
First Name
Mark
Joined
Nov 13, 2019
Messages
188
Reaction score
348
Location
Sonora, CA
Vehicles
'07 F-150 KR, '20 GT500, '21 Mach-E 4X Premium
Occupation
Retired
Country flag
OP
Murse-In-Airy

Murse-In-Airy

Well-Known Member
First Name
Rod
Joined
Mar 5, 2021
Messages
509
Reaction score
1,259
Location
Chaumont, NY
Vehicles
Mach-E ER AWD
Occupation
Nurse
Country flag
  • Thread starter
  • Thread Starter
  • #93
You think 1W would do it? Or even less? Looks like you can get them down to 1/4W.
Give me a minute. I’m going to dry and baffle mine now. I’ll get a wattage.
 
OP
Murse-In-Airy

Murse-In-Airy

Well-Known Member
First Name
Rod
Joined
Mar 5, 2021
Messages
509
Reaction score
1,259
Location
Chaumont, NY
Vehicles
Mach-E ER AWD
Occupation
Nurse
Country flag
  • Thread starter
  • Thread Starter
  • #94
Give me a minute. I’m going to dry and baffle mine now. I’ll get a wattage.
Sorry @generaltso My multimeter wont give me a reading. I may not be a talented enough electrician. Or I may not have enough hands to hold the probes in connection and the multimeter. Or my multimeter may not be fancy enough to read low enough. Or the car may end the electricity when it senses the disconnect. But no matter what the cause, I have failed you. I do have a part number that maybe we can cross reference and see if the speaker wattage is listed anywhere.
 
OP
Murse-In-Airy

Murse-In-Airy

Well-Known Member
First Name
Rod
Joined
Mar 5, 2021
Messages
509
Reaction score
1,259
Location
Chaumont, NY
Vehicles
Mach-E ER AWD
Occupation
Nurse
Country flag
  • Thread starter
  • Thread Starter
  • #95
2E6187BD-A8EE-4FC8-88C7-CFF0B6379069.jpeg
 

generaltso

Well-Known Member
Joined
Jun 24, 2020
Messages
3,500
Reaction score
5,192
Location
Vermont
Vehicles
2021 MME Premium AWD SR Infinite Blue
Country flag
Sorry @generaltso My multimeter wont give me a reading. I may not be a talented enough electrician. Or I may not have enough hands to hold the probes in connection and the multimeter. Or my multimeter may not be fancy enough to read low enough. Or the car may end the electricity when it senses the disconnect. But no matter what the cause, I have failed you. I do have a part number that maybe we can cross reference and see if the speaker wattage is listed anywhere.
Oh well, thanks for trying! I'm thinking something like this might work. How big were the contact slots in the plug?

EDGELEC 100pcs 4.7 ohm Resistor 1W, 1 Watt ±1% Tolerance Metal Film Fixed Resistor, Multiple Values of Resistance Optional: Amazon.com: Industrial & Scientific
 

CHeil402

Well-Known Member
First Name
Chris
Joined
Sep 21, 2020
Messages
511
Reaction score
883
Location
King of Prussia, PA
Vehicles
2017 Audi A4, 2021 MME
Occupation
Electrical Engineer
Country flag
Sorry @generaltso My multimeter wont give me a reading. I may not be a talented enough electrician. Or I may not have enough hands to hold the probes in connection and the multimeter. Or my multimeter may not be fancy enough to read low enough. Or the car may end the electricity when it senses the disconnect. But no matter what the cause, I have failed you. I do have a part number that maybe we can cross reference and see if the speaker wattage is listed anywhere.
Oh well, thanks for trying! I'm thinking something like this might work. How big were the contact slots in the plug?

EDGELEC 100pcs 4.7 ohm Resistor 1W, 1 Watt ±1% Tolerance Metal Film Fixed Resistor, Multiple Values of Resistance Optional: Amazon.com: Industrial & Scientific
Getting a wattage rating of a speaker using a DMM isn't exactly possible (not due to a lack of skills). You'd need to either: find the speaker's power rating from its datasheet, find the MME's amplifier output power that drives the speaker (assuming it's not built into the speaker module), or you'd need to measure the current driving the speaker when in use (power = current ^2 x resistance). One additional caveat is that a speaker works in AC not DC, so what you'd need is the speaker impedance (AC equivalent of resistance) which is frequency dependent (I said it was complicated).

That being said, it's probably more than 1 W. You might need a power resistor, or a larger resistance (depending on how the MME determines the speaker is missing)... or leave it be.
 
OP
Murse-In-Airy

Murse-In-Airy

Well-Known Member
First Name
Rod
Joined
Mar 5, 2021
Messages
509
Reaction score
1,259
Location
Chaumont, NY
Vehicles
Mach-E ER AWD
Occupation
Nurse
Country flag
  • Thread starter
  • Thread Starter
  • #98

mixduptransistor

Well-Known Member
First Name
joe
Joined
Feb 28, 2021
Messages
400
Reaction score
378
Location
Atlanta
Vehicles
2021 Rapid Red Mach E Premium Extended Range RWD
Occupation
Systems Engineer
Country flag
Those would probably work. The speaker can be removed from the housing. I’d cut the wire here and put the resistor in at this point. Could always reattach them later if needed.
Looks like you don't even have to cut the wire, are those connectors inside the housing soldered on?
 
OP
Murse-In-Airy

Murse-In-Airy

Well-Known Member
First Name
Rod
Joined
Mar 5, 2021
Messages
509
Reaction score
1,259
Location
Chaumont, NY
Vehicles
Mach-E ER AWD
Occupation
Nurse
Country flag
  • Thread starter
  • Thread Starter
  • #100

generaltso

Well-Known Member
Joined
Jun 24, 2020
Messages
3,500
Reaction score
5,192
Location
Vermont
Vehicles
2021 MME Premium AWD SR Infinite Blue
Country flag
Okay, I tried a resistor and it works as expected.

Disclaimer: The following information is for proof-of-concept purposes only. I do not recommend or endorse disabling any safety feature in this or any other vehicle. Do not operate your MME on public roads with the pedestrian warning sound disabled.

I was going to try some different resistors to see what would work. The first one I tried was a 5W 4.7 ohm, and it worked fine, so I didn't try any others. The connectors for the speaker wire slide right off the posts, and the resistor wire can be threaded through the holes in the posts, wrapped around, and crimped with pliers. I drove around for a bit (on a private closed course) in silence and then felt the resistor to make sure it remained cool to the touch, which it did.

1617480257970.png
 
OP
Murse-In-Airy

Murse-In-Airy

Well-Known Member
First Name
Rod
Joined
Mar 5, 2021
Messages
509
Reaction score
1,259
Location
Chaumont, NY
Vehicles
Mach-E ER AWD
Occupation
Nurse
Country flag
  • Thread starter
  • Thread Starter
  • #103
@generaltso Where did you get your resistor? Did it come in a multipack?
 
OP
Murse-In-Airy

Murse-In-Airy

Well-Known Member
First Name
Rod
Joined
Mar 5, 2021
Messages
509
Reaction score
1,259
Location
Chaumont, NY
Vehicles
Mach-E ER AWD
Occupation
Nurse
Country flag
  • Thread starter
  • Thread Starter
  • #105

Advertisement





 


Advertisement
Top