Low beams won't work
#3
04-02-2009 | 05:22 PM
Been Around A Long Time Member
Joined: Jun 2007
Posts: 7,381
From: St. Paul, MN
My first guess is the headlight switch or a frozen headlight relay.
With the headlights switched on, open up the fuse box in the engine bay and track down the headlight relays. Give them a good tap with the butt of a screwdriver and see if the lights turn on (relays are mechanical devices, they can break or seize). I don't know how you could test the headlight switch.
With the headlights switched on, open up the fuse box in the engine bay and track down the headlight relays. Give them a good tap with the butt of a screwdriver and see if the lights turn on (relays are mechanical devices, they can break or seize). I don't know how you could test the headlight switch.
#4
04-02-2009 | 05:49 PM
Super Moderator
Joined: Sep 2006
Posts: 15,995
From: Houston, TX
I agree with Finch with the problem being the switch or the relay.
The shop manual will help (get a 94 manual from online manuals thread in DIY section).
The headlight relay (in fuse box under the hood) will have 4 pins when you unplug it.
ERROR: Two of the pins should have 12V to body ground when the key is in the II/on position. Pins 3 and 4 will have no power. Either 3 or 4 pin should be grounded (~zero ohms to ground) when you turn on the headlight, and open (infinite ohms) when the headlight switch is off.
The shop manual will help (get a 94 manual from online manuals thread in DIY section).
The headlight relay (in fuse box under the hood) will have 4 pins when you unplug it.
ERROR: Two of the pins should have 12V to body ground when the key is in the II/on position. Pins 3 and 4 will have no power. Either 3 or 4 pin should be grounded (~zero ohms to ground) when you turn on the headlight, and open (infinite ohms) when the headlight switch is off.
Last edited by PAhonda; 04-02-2009 at 06:33 PM.
#6
04-02-2009 | 06:18 PM
Been Around A Long Time Member
Joined: Jun 2007
Posts: 7,381
From: St. Paul, MN
Almost easier to just head over to http://www.tasauto.com and order a new Honda Genuine switch for $40, once you verify the switch is the problem of course.
#8
04-03-2009 | 02:15 PM
Unregistered
Posts: n/a
I agree with Finch with the problem being the switch or the relay.
The shop manual will help (get a 94 manual from online manuals thread in DIY section).
The headlight relay (in fuse box under the hood) will have 4 pins when you unplug it.
thnx
rsuu
The shop manual will help (get a 94 manual from online manuals thread in DIY section).
The headlight relay (in fuse box under the hood) will have 4 pins when you unplug it.
thnx
rsuu
#9
04-03-2009 | 07:55 PM
Unregistered
Posts: n/a
Another set of questions about your replys.
PA honda I do get 12 volt from the two pin recepticles. I get infinite from receptical 3&4 regardless of switch position. Does that mean it is the switch. How do you test the relay. Also reading the manual they talk of a 20 pin connector. It is not on the back of the headlight switch or where it plugs into the wiring harness under the dash. Is there a way to test continuity across the switch when it is out of the car?
PA honda I do get 12 volt from the two pin recepticles. I get infinite from receptical 3&4 regardless of switch position. Does that mean it is the switch. How do you test the relay. Also reading the manual they talk of a 20 pin connector. It is not on the back of the headlight switch or where it plugs into the wiring harness under the dash. Is there a way to test continuity across the switch when it is out of the car?
#10
04-03-2009 | 08:34 PM
Super Moderator
Joined: Sep 2006
Posts: 15,995
From: Houston, TX
The switch is likely, but test the switch first.
The connector is a 20-pin connector that is behind the kick panel and towards the driver's door. Remove the lower plastic and unbolt the kick panel.
The shop manual doesn't have a good picture of the location. There are two 20-pin plugs right next to each other. One is a blue connector and a green connector, but I can't remember which one is for the headlight switch.
Looking at the plug that leads to the switch, the numbering is:
1234xx56789
10 11 12 13 14 15 16 17 18 19 20
Only 5-9 and 17, 18, and 20 have wires going to it.
The connector is a 20-pin connector that is behind the kick panel and towards the driver's door. Remove the lower plastic and unbolt the kick panel.
The shop manual doesn't have a good picture of the location. There are two 20-pin plugs right next to each other. One is a blue connector and a green connector, but I can't remember which one is for the headlight switch.
Looking at the plug that leads to the switch, the numbering is:
1234xx56789
10 11 12 13 14 15 16 17 18 19 20
Only 5-9 and 17, 18, and 20 have wires going to it.