no high beam headlights

[Tom_Barb]

Things we have already done.
1 changed both headlights, confirmed with continuity check.
2 replaced headlight switch. still no high beams.
3 replaced the relay (part number - H8002B).
4 checked every fuse in the coach. (continuity confirmed)
5. checked for power at the relay in both directions. power is good.

????
2000 Newmar mountain aire.
low beams work, as well as parking lights as well as the dash dimmer.

suggestions ?

[Tom_Barb]

enblethen wrote:
Sure sounds like it is the multi-function switch in the steering column or the wiring between it and the relay.
Is your relay and wiring in the compartment on outside below the driver?

It's in the front cap.


what is powering up the low beam head lights when the switch is off?

[enblethen]

Sure sounds like it is the multi-function switch in the steering column or the wiring between it and the relay.
Is your relay and wiring in the compartment on outside below the driver?

[Tom_Barb]

enblethen wrote:
First click should be parking lights, second should be headlights.
Post relay and headlight part numbers.

Right .....




did it again same results, all relays checked aging. all fuses checked again....
relay part number is 12088570

[AllegroD]

Had a similar problem a few years back. Brights but no dims. Turned out to be the wire harness in the column.

[enblethen]

First click should be parking lights, second should be headlights.
Post relay and headlight part numbers.

[Tom_Barb]

enblethen wrote:
In theory the low beam relay would be energized by the ignition switch. Low beams would go out when high beams come on.
A set of contacts in the low beam relay could be bad if my theory of operation is correct.
If low beam relay is the same as high beam or if you have old relay, change out low beam relay.

we will do that in the morning.

[Tom_Barb]

Up date..

as soon as the key is turned on, the low beams come on. headlight switch fully retracted.
headlight switch out 1 click, low beams still on.
headlight switch full out (2) clicks, all lights go out.

is there a chance a relay is out of position.

nc19143@comcast.net - for pictures of the fuse boxes and relay position.

[enblethen]

In theory the low beam relay would be energized by the ignition switch. Low beams would go out when high beams come on.
A set of contacts in the low beam relay could be bad if my theory of operation is correct.
If low beam relay is the same as high beam or if you have old relay, change out low beam relay.

[enblethen]

Low beams on some vehicles are daylight running lights.
Don't know if your rig is equipped in that way.

[Tom_Barb]

enblethen wrote:
Did you check for control power at the relay coil? Other side of coil should be ground.
Jumper the contact point in the relay socket to see if high beams come on.

YES, there is no voltage there. relay is good.

some thing has the circuit to the high beams turned off.

next question? is the low beams suppose to be on with the key on. head switch fully pushed in

I've never noticed.

[enblethen]

Did you check for control power at the relay coil? Other side of coil should be ground.
Jumper the contact point in the relay socket to see if high beams come on.

[Tom_Barb]

Charley67 wrote:
I just resolved a problem with no low beams. I was about to go into the steering column and look at my multifunctional switch, but I saw that my headlights relay was the same as one right beside it, so I switched them and bingo, lights working bright and dim. $21 at parts store and all is well. Good luck.

there are two headlight relays, 1 was not working. I replaced it. still no high beams.
I switched it, no difference - still no high beams.

[Tom_Barb]

enblethen wrote:
Am guessing you have a multi-function turn signal switch assembly. Have you checked for control voltage to the high beam relay? Does your turn signal lever allow for pulling up for energizing the high beams and down to lock in high beams?

The signal light lever can move 3 ways, left/right/ up.
the left/ right turn lights work normally.
the UP is supposed to cause the high beam to come on or off as required. it does nothing. high beams never come on.

I all so notice the the panel lights that operate dim bright function (dimmer) is always on when the key is on.
the light switch also operates the Over head reading light. it operates normal.

also the low beam lights are alway on when the key is on.

[Tom_Barb]

Ivylog wrote:
Do you have a smart steering wheel?

yes.

[Ivylog]

Do you have a smart steering wheel?