Question about 2002 Honda CR-V

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Headlight Cutoff Relay

I have a Honda '02 CR-V EX w/o daytime running lights and I have a problem with leaving the headlights on. There is no indication that the HL's are on when I turn the car off, not a chime or anything, and I'm unfortunately absent-minded enough that I don't always remember to check before I walk away. I looked over the wiring diagram in the Hayne's manual, which is not very comprehensive, and thought I found a fix. By inserting a (SPST) relay into the ignition wire and connecting it to the HL circuit, I figured I could make it so that the HL's will only come on when the key is in the 'ON' or 'START' position. I put the relay in, and it worked beautifully, except that I didn't get ignition. The starter cranks no problem (no surprise), but the engine won't start. When I take the relay out and reconnect the ignition wire, it starts. When I put the relay back in, it doesn't. Any idea of why this happens? Does it have to do with the rise time on the relay coil (which I think is ~5-7ms)? Or something with the PCM? With the headlight circuit connected to the switch side of the relay, I get about 100 ohms across the primary side terminals. Don't know if that has any bearing on the problem.

Thanks for any thoughts on this.

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  • ddault May 10, 2009

    I did cut the ignition wire to insert the relay (don't know of another way to put it in).

    I don't believe the relay has a diode (which it seems should come standard in all relays). I thought the diode was mainly to handle the voltage spike when the current is switched off. It doesn't seem like this should affect the steady-state performance, and anyway, the ignition coil voltages are so much higher that I didn't think this would have much of an effect.

    Thanks for the chime suggestion-- that was the other route I thought of, but it actually looked like more work to install. If I can't figure the relay out, I will try a chime.


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Honda crv 2003. dim headlights won't come up, but full light does. on dim light switched on, the three cables on the bulb connector turn hot (+) Please I need the circuit diagram for honda crv2003 headlight. Best reagrds
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From reading your description you sound pretty intelligent, So forgive me but I must ask these questions. How did you wire the relay?, Did you cut the ignition wire? Does the relay have a diode?
Instead of going this route, Maybe you could hook up a chime instead. There is a chime you can purchase at Radio Shack (12v dc electronic chime) Check out this link:
http://wwwx.cs.unc.edu/%7Ehays/crx/headlight_chime/, It may be helpful, and less complicated.

Posted on May 10, 2009

  • HondaAl
    HondaAl May 11, 2009

    When installing the relay, you don't need to cut the ignition wire, just open the insulation and tap off of the wire to get the ignition signal to the relay. That way the ignition system is in tact, functioning as it should and you have power to the relay when the ignition is on.

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All of my running lights and blinkers work and high beams but no low beams on my 1997 Chevrolet TahoeA


Headlamps Inoperative - Low Beams

Step

Action

Value(s)

Yes

No

DEFINITION: This diagnostic procedure should only be used if the high beam headlamps are operating properly and the low beams are inoperative.

1

Did you perform the Headlights System Check?
--
Go to Step 2
Go to Headlight System Check

2

  1. Turn the headlamp and panel dimmer switch to the ON position.
  2. Move the headlamp dimmer switch to the LOW position.
  3. Backprobe the headlamp dimmer switch connector with a J 35616-200 from cavity A to ground.

Does the test lamp light?
--
Go to Step 3
Go to Step 5

3

  1. Remove the daytime running lamp relay.
  2. Connect a J 35616-200 at cavity G5 to ground.

Does the test lamp light?
--
Go to Step 4
Go to Step 6

4

  1. Re-install the daytime running lamp relay.
  2. Backprobe cavity B at the high/low beam headlamp with the headlamp dimmer switch in the LOW position.

Does the test lamp light?
--
Go to Step 7
Go to Step 8

5

Replace the headlamp dimmer switch.

Is the repair complete?
--
Go to Headlight System Check
--

6

Repair the open in CKT 359 (PPL) between the headlamp dimmer switch and the daytime running lamp relay.

Is the repair complete?
--
Go to Headlight System Check
--

7

Replace the high/low beam headlamps.

Is the repair complete?
--
Go to Headlight System Check
--

8

  1. Inspect for an open in CKT 12 (TAN) between the daytime running lamp relay and S120, repair as necessary.
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Is the repair complete?
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Go to Headlight System Check
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cb2ea278-0e05-4927-a52c-891cd4b1e571.jpg
No. Amps Circuits Protected 1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38 7.5
15
10
7.5
(15)
(20)
_
10
7.5
7.5
10
10
10
7.5
7.5
10
10
20
15
7.5
20
_
_
(20)
20
20
(20)
15
15
20
(15)
20
20
7.5
7.5
10
7.5
30 Power Window Relay
Fuel Pump
ACG
ABS/VSA
Heated Seats*
Front Fog Lights*
Not used
Rear Wiper
ODS (Occupant Detection System)
Meter
SRS
Right Headlight High Beam
Left Headlight High Beam
Small Light (Interior)
Small Light (Exterior)
Right Headlight Low Beam
Left Headlight Low Beam
Main Headlight High Beam
Small Lights MAIN
TPMS
Headlight Low Beam
Not used
Not used
Moonroof*
Door Lock
Front Left Power Window
HAC Option
Rear Accessory Socket
Accessory
Front Right Power Window
Accessory Power Socket on the Center Table*
Rear Right Power Window
Rear Left power window
ACC Radio
ACC Key lock
HAC
Daytime Running Lights
Front Wiper * If equipped

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