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Maybe someone can help explain about fuse in the car. I have 2017 MDX AWD Base model. I've been viewing Youtube on how to check fuse for "switch" or "constant" power with either a multimeter or Circuit Tester (see picture) that light up if there's a constant power. Based on youtube, Power Window should be a "switch" meaning only work if engine is ON. If engine is OFF you cannot open windows. True because I test it window don't open when engine Off. However, when I test with a multimeter or light up tester as show below, Power window fuse is a constant power. This is tested when car engine is OFF. This is the fuse:
Fuse #17 RR DR P/W 20A and Fuse #19 FR DR P/W 20A all show 12V or lightup when tested and engine is OFF. Why?
2) What is fuse #12 IG1 FR 20A mean? Seem like this is the only fuse that IG1 that is a switch but I'm not sure what that IG1 mean. I'm looking for a fuse with at min 15A so I can tap to Cellink Battery B v2 for dashcam.
Are you checking as you first get in the car without putting the key in the ignition? Or do you have key in ignition and just turned off the car and checking?
Are you checking as you first get in the car without putting the key in the ignition? Or do you have key in ignition and just turned off the car and checking?
the suv is a push start. I move the car to my driveway then I shut off the engine and car remote in my pocket. Then I test the power seat fuse and it show a 12v when engine is completely off.
Try when you first get into the car not after engine start .
Ok after my last reply I then went to check the fuse again and power window still show 12v. The car engine was off for an hour already. Is 2017 mdx different from other car that's y power window fuse is a constant power?
the suv is a push start. I move the car to my driveway then I shut off the engine and car remote in my pocket. Then I test the power seat fuse and it show a 12v when engine is completely off.
Wait you said power seat here. I believe power seat is always constant.
IG is ignition typically. As in if you press the start button with out the brake pedal depressed. It should go into accessory mode and there theoretically should be power there. Can you test and confirm?
The fuse is always hot by design in order to allow control of the power windows after the ignition is off and to allow for remote operation, again while the ignition is off. If the fuse is not hot then it's not possible to have control of the windows after you turn off the engine. There's probably a computer controlled timer to cut the power to the windows after a set mount of time. Once you unlock the doors the power is turn on at the same time to accommodate the lowering of the windows if call upon.
#12 IG1 FR 20A probably stands for Ignition 1 Front 20A.
The fuse is always hot by design in order to allow control of the power windows after the ignition is off and to allow for remote operation, again while the ignition is off. If the fuse is not hot then it's not possible to have control of the windows after you turn off the engine. There's probably a computer controlled timer to cut the power to the windows after a set mount of time. Once you unlock the doors the power is turn back on by the computer at the same time to accommodate the lowering of the windows if call upon.
#12 IG1 FR 20A probably stands for Ignition 1 Front 20A.
Yes, Fuse #12 IG1 FR only has power when I push start. Once enigne off, no power to fuse #12.
i guess with all the advance technology, it is hard to tap to almost any fuse since majority alway "hot" because of chip/computer besides tap into wire itself, i guess
02-01-2017, 08:16 PM
