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That's right folks this car blows the fuse for the left low beam only when cranking the engine over. Like what the fudge! Well, let's have a look.
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95 thoughts on “Chevrolet aveo: blows left headlight fuse only when cranking the engine!?”
  1. Avataaar/Circle Created with python_avatars RAEL says:

    So….when the headlights are off, the headlight circuit would open……yes? Cranking the engine wouldn't matter. But if the headlight circuit is shorted to the starter wire ….somehow…..then when you engage the starter it would shoost high current through the headlight circuit. (as Lisa on Green Acres would say)

  2. Avataaar/Circle Created with python_avatars Joshua Lee says:

    As soon as you explained the circuit and how it works I was thinking daytime running lights.

  3. Avataaar/Circle Created with python_avatars Rick Bates says:

    I see a trip to the wreckers coming up …

  4. Avataaar/Circle Created with python_avatars Chad Hulsizer says:

    Do you have a time sert kit for triton motors? I have one that I don’t need anymore and would like to send it to you if you want it. Love the channel by the way, keep up the great work.

  5. Avataaar/Circle Created with python_avatars Jon Miner says:

    Well, Mr. O. A good detective always works better if he gets a clue. Anyway, thanks for sharing! Stay healthy!

  6. Avataaar/Circle Created with python_avatars richard sawtell says:

    In new zealand you can disable DRLs as long as they are not use as park lamps that dim , if one fails you can either fix it or disconnect the other one , if you only have one going it will fail an inspection, after market DRLs can not operate with park lamps or headlamps on

  7. Avataaar/Circle Created with python_avatars THRASH METAL & FUN RIFFS says:

    yeah jerk, hold the little bight yellow car hostage for not having crappy headlights on during the damm day

  8. Avataaar/Circle Created with python_avatars People These Days Be Retarded says:

    Aveos seemed like a POS to me, like the Nissan Versas (I think that’s what they’re called, the tiny cars).

  9. Avataaar/Circle Created with python_avatars TheOmegaman69 says:

    Very, very interesting case here. Great job diagnosing this weird issue.

    The one question that keeps lingering for me is, what happens when the ignition switch is in START that doesn't happen with ignition switch in any other position (if Low Beams are on, but not when they are off), as it relates to the Daytime Running Lights module?

    It appears that the load side of the relays, Pin 30, connects directly to the battery and the fuse is in the leg from the Relay Pin 87 to whatever load there is. This seems to be true of all, or most all, the relays. Obviously, the Starter is engaged through the Starter Relay. And, we know that the Starter draws a lot of current. Because the view was of the Meter each time Eric cranked the car, I could not see if the headlights (low beam) dimmed or not, and if so how much. Now I know one test had the left headlight disconnected, so that cut the normal current down in about half, so it would not be the headlights themselves, as this test pretty much proved.

    I wish we could have seen the battery voltage when cranking both with and without the Low Beams on. I ask this, again, because there is something that happens when the ignition switch is in START that doesn't happen when it is in any other position, which causes this issue (only if Low Beams are on). Since Pin 30 (load side input) of both the Starter Relay and the DRLs FET (Field Effect Transistor) power input connect directly to the battery (FET through fuses – EF1 in Engine Compartment Fuse Box, and F15 in the I/P Fuse Box), the main thing that does change is the battery voltage will drop when ignition is in START..This is normal, but should not drop to below about 10 volts.

    The DRL Module in the I/P Fuse Box might just be bad. Or, something (an input) to this module happens when starting and Low Beams are on into this module. The one thing I can think of is the battery voltage dropping enough to switch the DRL FET on (grounding the LTGRN/BLK wire, which would cause a direct short to the positive side of the battery, IF, the Low Beams are on, across fuse EF21 in the Under Hood Fuse Box, the one that is blowing). This would not happen when Low Beams are off, because relay HDLP LOW RELAY in the Under Hood Fuse Box is not on.

    Finally, even if something like I have described (battery voltage dropping, or something else into the DRL Module) is happening, it probably should not cause the DRL FET to drive the LtGRN/BLK wire low if the Low Beams are on. This should never happen under any condition. Since this same module controls turning on the Low Beams and High Beams, as well as Fog lights, through the Headlight Switch & Fog Light Switch, it appears to be working except for the DRL part. I wonder if the Headlights are turned off (or suppose to be, to extend battery life), by this module, when cranking (ignition in START position).

    As stated, very interesting. One of the most interesting ones, and extremely well done diagnosis that Eric did. Impressive. And, thanks Eric for taking the time to make this video. It is appreciated very much.

  10. Avataaar/Circle Created with python_avatars Nate Tallman says:

    Eric O. showing his libertarian leanings 😁. Just because he lets the customer drive it away doesn't mean he has to give them an inspection sticker.

  11. Avataaar/Circle Created with python_avatars Daddyoh says:

    Great diagnosis on this electrical problem. You are a talented self-made mechanic/technician. I enjoy watching your channel.

  12. Avataaar/Circle Created with python_avatars Larry andJean Lynch says:

    Vanessa and Eric, We love you both and we hope Satan isn't attacking you two as Satan hates a married couple that loves Jesus! We do our best to remember you and your lovely godly family in prayer! Please pray for our marriage too!

  13. Avataaar/Circle Created with python_avatars mcompton2010 says:

    Had an old neighbor ask for help changing a fuel pump on an early 90s chevy 3500. Said he had a used pump, the pump was in a tank that he said came from a mid 2000s silverado. Told the guy there's no way the pump would go into the old tank. He cut the harness off his truck and wired up the newer pump but left it in the newer tank so it was in no way, shape or form made to fit under this truck properly. The guy stuck an exhaust adapter in the fill hole on the tank to be able to attach the fill hose and wrapped an old rope, like the ones you had to climb In school around the tank and frame several times to secure it. Trust me, there's much more on the roads to worry about than this guys headlights. Needless to say, if I ever seen the guy on the road after that, I went the opposite direction.

  14. Avataaar/Circle Created with python_avatars MIke Anonymous says:

    DC current flows from negative to positive. Not from the positive source to negative. In a DC Circuit current flowns from positive to negative in the source (Battery/Power Supply). Clear as mud?

  15. Avataaar/Circle Created with python_avatars homie789 says:

    This was a great video Eric and I hope you didn't charge this man for the diag, the experience and seeing such an odd failure is worth the time spent.

  16. Avataaar/Circle Created with python_avatars Kenneth Schilling says:

    To me personally I hate day time running light I think it is a waste to have them on cars. What I read online that day time running lights are not required in all 50 states of the US but are required in Canada. The biggest reason I hate day time running lights and think they are a waste because the lights tend to shine right in your eyes when reflected in your rearview mirror or your side mirrors and that can really hurt your eyes and make it hard to see.

  17. Avataaar/Circle Created with python_avatars John NoneDoe says:

    Sweden is one of the countries where Day running lights DRL are required by law (since the early 70's)

  18. Avataaar/Circle Created with python_avatars Don Chambers says:

    Well done, Eric. Is this why so many of the GM trucks I see have 1 working headlamp? It's been going on for years.

  19. Avataaar/Circle Created with python_avatars Dan Woods says:

    I've seen a couple of those Aveos with a DRL module that has caught fire. I'm wondering now if it was because someone jammed in a higher amp fuse

  20. Avataaar/Circle Created with python_avatars Michael Kenefick says:

    Why would they have to turn the lights on and off? They should be automatic.

  21. Avataaar/Circle Created with python_avatars Utah York says:

    Half way through I made some popcorn and then enjoyed the resolution. Thanks Eric!

  22. Avataaar/Circle Created with python_avatars PracticalPeasant says:

    Up here in Canaderp, DRL modules have been required for years; They typically use PWM to get a lower brightness out of the high-beams.

  23. Avataaar/Circle Created with python_avatars Timothy Peterson says:

    Eric,, Amen brother glad you understand freedom kudos to you.

  24. Avataaar/Circle Created with python_avatars Hola! Craig Goodwin says:

    Eric, thanks for your link to the schematic you and we were looking at. Sort of makes sense this way. Should be noted…"no parts required!". Thanks for Sharing!

  25. Avataaar/Circle Created with python_avatars Wil Gerdes says:

    "… welcome to the real world kid…". Wish more ppl understood that!

  26. Avataaar/Circle Created with python_avatars Gregory Fairchild says:

    We are supposed to disable the car then hand them the keys.
    The life you save may be that customer.
    No, you can't hold the car hostage EXCEPT for money owed for repairs. And there may be a $$ amount in your states.
    But yes, this is the law in Ohio, not sure about other states but you can Google it quickly.
    Now, if you tell them what you did or if the customer puts the coil wire back on or whatever and drives away, thats on them.
    If you let them drive it away like nothing's wrong, and the hurt or kill someone, you can be sued and or fined or charged with a minor misdemeanor at the least.
    You're not being compassionate by letting them go with real safety risks.
    But in Ohio you are not supposed to hand it back running.
    ((Ohio Title 45, section 4513.02, paragraph (A) No "person" shall drive, move or "knowingly permit" to be driven or moved on any highway any vehicle or combination of vehicles which is in such unsafe condition as to endanger any person ."))
    That said, I wouldn't do it for a blown headlight.
    But rusty frames to the point its structurally unsafe, brakes, steering suspension, fuel leaks etc.

  27. Avataaar/Circle Created with python_avatars William T. Musil says:

    Hiya Eric

  28. Avataaar/Circle Created with python_avatars for2utube says:

    DRL:reverse current and a transistor. I think my wife’s fit just puts both L and R filaments in series or in parallel for day/night mode.

  29. Avataaar/Circle Created with python_avatars Scott Saunders says:

    Damn, I wish I could get my vehicle to you. Maybe you could tell me why my 99 Toyota 4Runner won’t engage the AC compressor clutch at idle, only when the gas pedal is pressed.
    It’s driving me nuts.

  30. Avataaar/Circle Created with python_avatars Russell Smith says:

    You’re hot wire going to the starter my be to close to the frame

  31. Avataaar/Circle Created with python_avatars mike w says:

    definiteiy one of best diagnosis you have ever posted.

  32. Avataaar/Circle Created with python_avatars chad harmon says:

    chinas finest the aveo

  33. Avataaar/Circle Created with python_avatars ken says:

    Good future reference video Eric.Thanks for the lesson.

  34. Avataaar/Circle Created with python_avatars Butch Romig says:

    put a 15 amp fuse in the low beam!!!!

  35. Avataaar/Circle Created with python_avatars de screwface says:

    "Hypothesis 478" 🤣😂🤣 I about died.

  36. Avataaar/Circle Created with python_avatars Ivan Olsen says:

    yep ….. untill a vehicle leaves a shop and kills the shop owners family / member …. I get what you said … is it extortion if money is not the issue but PUBLIC SAFETY is …. or as I've typed before … let the car go … after calling the police …. who are down the road waiting to do a on the spot roadworthy inspection

  37. Avataaar/Circle Created with python_avatars Mike Thomas says:

    I have that same amp clamp. It does not have an auto off function. If you leave it on, it drains the battery. I keep spare batteries in the drawer with it.

  38. Avataaar/Circle Created with python_avatars Ryder Naymik says:

    Can’t tell you how much I’ve learned about tracing electrical problems from this guy.

  39. Avataaar/Circle Created with python_avatars Mike Carson says:

    To no avail it's still not fixed!!

  40. Avataaar/Circle Created with python_avatars Diesel FIX'R says:

    Not an electronic guy? I come here for your electrical knowledge and have learned alot over the years.

  41. Avataaar/Circle Created with python_avatars Walter T. Butler says:

    WOW! . . . and you're not an electronics guy! Yeah, right. GREAT JOB!

  42. Avataaar/Circle Created with python_avatars Marty Howard says:

    I know in Washington State that all lights on a vehicle must work or you can get a ticket. That includes lights the vehicle owner installed not just the factory installed ones…

  43. Avataaar/Circle Created with python_avatars Slingbart says:

    Not a big electronics guy??? if you're not, the rest of us are doomed!