Power window Master switch

BENNIT LM

MEMBER
2003 HONDA ODYSSEY
225,000 MILES

I read multiple Q&A already. Diagnostics I ran so far

1) Passenger window can be rolled up with Driver panel. If I switch phases on passenger door window can be rolled down as well ruling out a faulty motor.
Relay clicks only in one switch position.

2) I don't understand the master (child) switch on the driver side control panel. Red/white wire on master switch has only about ~8 V
Should it not have 12V?

3) vent windows in back of car operate sluggish. Also suggesting voltage drop. Fuses all checked and working. How to test relay?

If we figure this out we learned a lot.
Cheers

3 Replies

94 TRANSAM

MECHANIC
680 POSTS

Hi and welcome to 2CarPros. Lets see if we can help you.

First, I need some more information about your car so I can research this for you.

Is it an EX, an EX-L or an LX?

I need this info to pull up the proper wiring diagrams.

Thank you, Rich.

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Tuesday, September 10th, 2019 AT 2:09 PM

BENNIT LM

MEMBER
2 POSTS

Thanks Rich,
it's a
EX 4dr Minivan w/Leather (3.5L 6cyl 5A)

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Thursday, September 12th, 2019 AT 9:18 AM

94 TRANSAM

MECHANIC
680 POSTS

Hi Bennit, So I have looked over the diagrams for your window system and they remind me why I miss hand crank windows LOL. Anyway the diagrams are uploaded below. The whole system should be 12 volts so 8 is not good. I would use the diagrams to check some key voltage points but I would be looking at a possible multiplex control unit failure on one or both doors. Your voltage reading should narrow it down.

Let me know what you find out.

Rich.

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