We have searched and searched and cannot find how or why they no longer come on. Is there some secret fuse for just the running lights or some secret we don't know (we are not the original owner)? Everything works fine when you turn the headlights on, but the daytime lights just quit.
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It is located in the underhood fuse/relay box , marked DRL 10 amp fuse ! Also if that is good check the DRL relay in the same fuse/relay box .Your light sensor could also be bad .
The daytime running lamps (DRL) will operate when the ignition switch is in the RUN position, for automatic transmissions (A/T), the gear selector is not in the PARK position, the headlamp switch is in the AUTO position, and for manual transmissions (M/T), the park brake is released. When these conditions have been met and the ambient light sensor indicates daytime conditions, the DRL will illuminate. The ambient light sensor is a light sensitive transistor that varies its voltage signal to the body control module (BCM) in response to changes to the outside (ambient) light level. When the BCM receives this signal it will either turn on the DRL or the headlamps for auto headlamp operation. Any function or condition that turns on the headlights will cancel the daytime running lamps operation. The DRL can be manually turned OFF by depressing the AHL/DRL switch in the headlamp switch
Do you know that on inside of fuse box lid it shows what fuse is what .
Head light have two relays.one for daytime and one for normal night. the daytime switching the light to serial circuit and if one bulb is out down both Leigh quit working. Inspect your light high and low beam for normal operation . Inspect your fuses . Swap the daytime relay with identical one.and under the dash is module for daytime running light. inspect the red/black wire for ground from light switch and light blue/ yellow for power from 15A ECU-B fuse
You have 3 fuses you need to inspect. All are under the hood in the power distribution relay box. Fuse first is the head main relay its a 30 amp fuse inspect to make sure its not open.You will also have a right hand lamp fuse and a left hand lamp fuse. Inspect and make sure they are not open. If all the fuse are good and your daytime running light are still non operation you can narrow it down to the daytime running light module. If this module sees a parking brake switch engage the daytime light will not operate.
follow the wires to the drl relay. It must be inline from the regular light switch to the headlamps. I have a 1990 Cadillac Deville that has an aftermarket module that controls the daytime running lamps, and it is mounted on the driver's side wheel well.
Some relays are found in the fuse box under the hood.
If your daytime running lamps burnt out, take it to an electrical shop and ask them to check it out.
If you buy an aftermarket daytime running lamp kit, they can install it for you.
But, I agree, you should check for voltage and function at the relay for the daytime running lamps on your Astro.
But, if all else fails, the electrical shop should be able to diagnose and repair this problem.
Check your altenator. Mine had the same problem blew all the front headlights, running lights. My altenator was over charging the system. Sounds like you need a new altenator. Pull the bulbs to see if they are blown..if your lucky the fuse just went. Fuses #15,16,17,18 located beside the battery may just be blown also.
If you purchased your vehicle in the States, it is not equipped with Daytime Running Lamps, you will have to purchase an aftermarket module and have them installed to the parking lamp circuit in order to save the wear on your Xenon bulbs. Only Canadian models have running lamps standard. As far as your clock I know that the bulbs in Infiniti clocks are notorious for going bad. You can remove the clock and replace bulbs, but I would check your fuses, there is a fuse panel down in the drivers floor kick panel. I would suggest doing a google search for G35 manual and you can probably find some site that has a PDF version you can download for free.
When the parking brake is applied there is a switch that will cut off the daytime running lights, and they will not work as long as the parking brake is applied. If you have released the parking brake and they no longer work, either the switch that cuts them off is bad or the sensor for the lights is bad.