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Old 08-02-2016, 02:09 AM   #1
sc2 saturn
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Default 6v DRL?

has anyone made a converter to convert the 6v into say 9 or 12v? for the day time running lights so you can still have DRL when you have HID kit?

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Old 08-02-2016, 04:33 AM   #2
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Default Re: 6v DRL?

Some background info you need to know before continuing. From the service manual, and specifically 2001 Saturn SL2/SC2/SW2;

Daytime running lamps are standard on all Saturn models..... This circuit results in both high beam lamps being connected in series, which allows the high beam lights to operate at half brightness. When driving at night or manually switching on high beams, the series circuit is bypassed and both high beams have 12v to each lamp for full power. This also means the low beams are not affected and run like all low beams, each low beam is wired to 12v for full power.

Are you trying to wire in HID's for low beams? If yes, no wiring mods needed. If wiring for HID high beams, HID's cannot run in a series circuit (DRL mode). You have two options; lose DRL mode by removing the DRL relay that prevents the series circuit from operating and manually switching high beams. From my understanding of Canadian laws, daytime running lights are mandatory so removing the DRL relay and disabling DRL's would be illegal. If you want DRL's and want HID's on high beams, some thought is needed to see if a mod can be made to run high beams in parallel mode where daytime HID's high beams are wired for full 12 volts to each lamp.

Below is the DRL wiring schematic. I haven't examined it for accuracy because DRLs are wired differently from one model to another. My L300 uses low beams for DRL's and wired in series but switch back to parallel/full 12v when night driving or manually switched.
Attached Images
File Type: jpg '01 Saturn DRL.jpg (102.7 KB, 5 views)

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Old 08-02-2016, 10:06 AM   #3
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Default Re: 6v DRL?

It is possible to rewire so the parking light bulb filament is now the DRL light but it is a major mod to the UHJB wiring. This works very well.

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Old 08-03-2016, 03:34 AM   #4
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Default Re: 6v DRL?

Quote:
Originally Posted by fdryer View Post
Some background info you need to know before continuing. From the service manual, and specifically 2001 Saturn SL2/SC2/SW2;

Daytime running lamps are standard on all Saturn models..... This circuit results in both high beam lamps being connected in series, which allows the high beam lights to operate at half brightness. When driving at night or manually switching on high beams, the series circuit is bypassed and both high beams have 12v to each lamp for full power. This also means the low beams are not affected and run like all low beams, each low beam is wired to 12v for full power.

Are you trying to wire in HID's for low beams? If yes, no wiring mods needed. If wiring for HID high beams, HID's cannot run in a series circuit (DRL mode). You have two options; lose DRL mode by removing the DRL relay that prevents the series circuit from operating and manually switching high beams. From my understanding of Canadian laws, daytime running lights are mandatory so removing the DRL relay and disabling DRL's would be illegal. If you want DRL's and want HID's on high beams, some thought is needed to see if a mod can be made to run high beams in parallel mode where daytime HID's high beams are wired for full 12 volts to each lamp.

Below is the DRL wiring schematic. I haven't examined it for accuracy because DRLs are wired differently from one model to another. My L300 uses low beams for DRL's and wired in series but switch back to parallel/full 12v when night driving or manually switched.

they don't really inforce it too much in Canada for DRL what do u mean by wired in series but switched back to parallel?

cause i believe its pink wire or blue wire is the "highbeam" wire and it drops to ground when high beams are active, im pretty confused on how to get atleast 9-12v for drl instead of the dumb 6v

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Old 08-03-2016, 05:48 AM   #5
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Default Re: 6v DRL?

The main confusion about GM's method to address and incorporate daytime running lights while sidestepping HID lighting is this; GM simply uses plain electrical fundamentals, series and parallel circuits with relays, light sensors and electronics to control automatic daytime running lights, switching to night time full power lighting without having to manually turn on headlights. To accomplish this feat was simply using a series wired configuration not used in normal headlight wiring. Series wiring simply means wiring two electrical components together, in this case the two high beams, in series by connecting one light connection to the battery, the other wire to the second headlight wire and the second headlight wire to ground. Series wiring simply reduces the current to both headlights since they're electrically resisting battery current. This is not normal headlight wiring. All headlights are wired in parallel where each headlight is wired to have 12v. Below is a simple series and parallel circuit. The drl lights do not have 6 volts as you may imagine. It's more about impeding battery current flow that reduces current that GM uses to allow daytime running lights without burning out headlights from drl use. Reducing current to each headlight in drl use doesn't shorten the life of halogen lamps and ideally incorporated here. HID lights cannot run in a series circuit with many attempting to convert to HID light while using the drl circuit blame wiring or cheap HID kits when its not wiring or HID's but lack of knowledge in basic electricity.

To fully understand series and parallel wiring also requires reading and understand wiring schematics.

HID lights only work as 12v lighting systems and cannot work in GM's series/parallel headlight systems. The series circuit in drl mode simply fails to provide full 12 volts to HID lights wired in series. If the headlight were manually switched on, the drl mode is switched off and parallel wiring is in place to supply the same HID light with 12v to each ballast as in normal headlight wiring (parallel).
Attached Images
File Type: jpg series.jpg (26.6 KB, 2 views)
File Type: jpg parallel.jpg (36.1 KB, 2 views)

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Old 08-03-2016, 01:22 PM   #6
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Default Re: 6v DRL?

My two cents, I would disable the OEM DRL relay with a wire, then install separate LEDs to function as DRLs (through a relay, turn on when engine is one, turn off when there is power to headlights or high beams)

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Old 08-03-2016, 03:22 PM   #7
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Default Re: 6v DRL?

There are multiple solutions to this issue. Wiring in series is not required to solve this.

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Old 08-06-2016, 01:31 AM   #8
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Default Re: 6v DRL?

Quote:
Originally Posted by fdryer View Post
The main confusion about GM's method to address and incorporate daytime running lights while sidestepping HID lighting is this; GM simply uses plain electrical fundamentals, series and parallel circuits with relays, light sensors and electronics to control automatic daytime running lights, switching to night time full power lighting without having to manually turn on headlights. To accomplish this feat was simply using a series wired configuration not used in normal headlight wiring. Series wiring simply means wiring two electrical components together, in this case the two high beams, in series by connecting one light connection to the battery, the other wire to the second headlight wire and the second headlight wire to ground. Series wiring simply reduces the current to both headlights since they're electrically resisting battery current. This is not normal headlight wiring. All headlights are wired in parallel where each headlight is wired to have 12v. Below is a simple series and parallel circuit. The drl lights do not have 6 volts as you may imagine. It's more about impeding battery current flow that reduces current that GM uses to allow daytime running lights without burning out headlights from drl use. Reducing current to each headlight in drl use doesn't shorten the life of halogen lamps and ideally incorporated here. HID lights cannot run in a series circuit with many attempting to convert to HID light while using the drl circuit blame wiring or cheap HID kits when its not wiring or HID's but lack of knowledge in basic electricity.

To fully understand series and parallel wiring also requires reading and understand wiring schematics.

HID lights only work as 12v lighting systems and cannot work in GM's series/parallel headlight systems. The series circuit in drl mode simply fails to provide full 12 volts to HID lights wired in series. If the headlight were manually switched on, the drl mode is switched off and parallel wiring is in place to supply the same HID light with 12v to each ballast as in normal headlight wiring (parallel).
HID lights work from 9v up to 16V i believe so any less it won't work

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Old 08-06-2016, 06:45 AM   #9
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Default Re: 6v DRL?

It's not about voltage range. It's understanding that HID lights will not work in Saturns with drl's using series wired lights. It's also the only reason GM couldn't install HID lights in the S-series, L-series, Ions, Aura's, and Outlooks. All have their lights wired in series in DRL mode then switch to parallel mode at night. Vues use a resistor instead of series wired headlights to do the same, reduce current for DRL mode then bypass the resistor for full power at night.

Your high beams are used in DRL mode; they're wired in series as shown in the simple diagram. At night the DRL mode is switched automatically to parallel wiring so each lamp receives full 12 volt power. In DRL mode your high beams see half the current they normally have. When not in DRL mode they receive full current. Hid lights work only with full current and will not work in DRL mode if you add HID lights as high beams.

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