Low beams won't work
#3
04-02-2009, 04:22 PM
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, 04:49 PM
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 05:33 PM.
#5
04-02-2009, 04:57 PM
To test the switch you'll unplug it & measure continuity thru each circuit at each of the switch positions. So you'll need a wiring drawing to know which wires are SUPPOSED to have continuity...
#6
04-02-2009, 05:18 PM
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, 01:15 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, 06:55 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, 07:34 PM
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.