What would cause the self-test lights

in2it · Post by **in2it** » Mon Mar 06, 2023 7:35 pm

My cruise control quit working on a 2000 Asp ... wouldn't hold nor the lights wouldn't in gauge ... the cruise light and set light didn't come on briefly during the brief system check when the ignition switch was turned on... I have replaced both left and right switch pods (PIA) due to sticky switches and age ... I also have replaced both clutch switches and the brake cancel cruise switch ... and still do not have the brief system light check ... I have check power at the C66 female connector for both the cruise control lights and I have power there ... also I have continuity between the C66 and C33 and I have it ... I'm at wits end and asking for suggestions as to what I'm overlooking .... Thanks in advance for leading me through the pasture on this.

plain · Post by **plain** » Tue Mar 07, 2023 7:17 pm

Does your LCD work??

in2it · Post by **in2it** » Wed Mar 08, 2023 10:34 pm

plain wrote: ↑Tue Mar 07, 2023 7:17 pm Does your LCD work??

Yes it does

plain · Post by **plain** » Sat Mar 11, 2023 6:11 pm

I think I remember seeing a place on the circuit board for this lamp test thing. I remember reading something about it when I had to track down a burned trace on my circuit board that eventually caused the LCD to quit is the reason I asked about the LCD. Anyway, if you search about the board I think DenverWinger is the person who got me started repairing mine and it might help to search for threads he has posted. I'll see if I can find them too.

plain · Post by **plain** » Sat Mar 11, 2023 9:16 pm

Well, from what I have read from the manual and what little experience I have with replacing LCD and fixing the circuit board I think the circuit board. If you have power all the way to C66 on both circuits there's not much left but the LCD circuit board if the drawings are correct, unless there is a ground loose somewhere but you would think it would be too much of a coincidence for a bad ground.
Maybe a bad capacitor common to both or a burned trace common to both. Honda went to so much trouble to geezer-proof (and yes, I'm a geezer) these things that the LCD circuit board throws a fit and a lot of stuff won't work right.
Sorry I couldn't help more. I will note though if looking for a burned trace, put a very strong light behind the board and you'll be surprised at how well you can see the guts of it.

DenverWinger · Post by **DenverWinger** » Sat Mar 11, 2023 11:12 pm

I agree the bulb test function comes from the LCD board.

I've looked at the schematics some, not all bulbs do the "test", for instance the oil pressure light, it will be on anyway until the engine starts.

But there's at least five bulbs that to the "test" function (Haven't put the key in my bike to count them, but....) so there will be a significant transistor on the LCD board to do this, the bulb test function will be passing all of the current from however many bulbs to "Ground" and at 200-250 ma for each bulb will be around an amp to two amps current for the duration of the bulb test.

So look for a transistor on the LCD board that can handle two amps for a short duration. Pretty sure the bulb test happens on the "Ground" side of the bulbs rather than on the "Hot" side.

There's probably a bunch of diodes, too, to isolate the individual indicator bulb circuits from the Bulb Test function.

in2it · Post by **in2it** » Sun Mar 12, 2023 10:55 am

plain wrote: ↑Sat Mar 11, 2023 9:16 pm Well, from what I have read from the manual and what little experience I have with replacing LCD and fixing the circuit board I think the circuit board. If you have power all the way to C66 on both circuits there's not much left but the LCD circuit board if the drawings are correct, unless there is a ground loose somewhere but you would think it would be too much of a coincidence for a bad ground.
Maybe a bad capacitor common to both or a burned trace common to both. Honda went to so much trouble to geezer-proof (and yes, I'm a geezer) these things that the LCD circuit board throws a fit and a lot of stuff won't work right.
Sorry I couldn't help more. I will note though if looking for a burned trace, put a very strong light behind the board and you'll be surprised at how well you can see the guts of it.

Thank you for taking the time to look... it maybe something in the board ... was thinking perhaps the Cruise module itself ... even tested each blub to make sure they work ... after a week of testing and tracing ... I have put the bike back together ... for now ... yes I have thrown in the towel for now ... but havent given up

in2it · Post by **in2it** » Sun Mar 12, 2023 11:09 am

DenverWinger wrote: ↑Sat Mar 11, 2023 11:12 pm I agree the bulb test function comes from the LCD board.

I've looked at the schematics some, not all bulbs do the "test", for instance the oil pressure light, it will be on anyway until the engine starts.

But there's at least five bulbs that to the "test" function (Haven't put the key in my bike to count them, but....) so there will be a significant transistor on the LCD board to do this, the bulb test function will be passing all of the current from however many bulbs to "Ground" and at 200-250 ma for each bulb will be around an amp to two amps current for the duration of the bulb test.

So look for a transistor on the LCD board that can handle two amps for a short duration. Pretty sure the bulb test happens on the "Ground" side of the bulbs rather than on the "Hot" side.

There's probably a bunch of diodes, too, to isolate the individual indicator bulb circuits from the Bulb Test function.

Thank you for taking the time to look... it maybe something in the board ... was thinking perhaps the Cruise module itself ... even tested each blub to make sure they work ... after a week of testing and tracing ... I have put the bike back together ... for now ... yes I have thrown in the towel for now ... but havent given up ... will get back with you my friend after I subside from the first go around of tracing ... I do see your point... if I have continuity from C66 to C33 the board is at fault ... let me go for a few rides for the weather has been nice as I see other riders past by the house ... just got the itch and truth be known... got frustrated ... I couldnt put my finger on it ... if that makes sense

in2it · Post by **in2it** » Sun Apr 02, 2023 12:36 pm

Ok... I know what would and did cause the lights not to light ... it is due to the LED updated screen ... doesnt support the function ... I knew this but I have forgotten it ... since going through Covid and chemo treatments .. I totally forgotten about the reason why the lights dont function.... I do appreciate the answers and the reply with answers ... but it was something that slipped my mind since I havent ridden much due to treatments.

plain · Post by **plain** » Mon Apr 03, 2023 9:04 pm

Oh wow! I guess the test lights haven't been too important the past few months! I hope you're doing better Bro! I'll put in a good word to The Man Upstairs.

in2it · Post by **in2it** » Tue Apr 04, 2023 5:23 am

Your right... wasnt to important ... going through chemo I wouldnt wish that on anyone... but thats behind me now ... went riding Saturday and rode over 300 miles ... rode to Queen Wilhimena State Park from Waldo, AR and back ate lunch there ... had a good ride the weather was excellent

DenverWinger · Post by **DenverWinger** » Tue Apr 04, 2023 7:04 am

Glad to hear you're on the mend, and the bulb mystery solved!

Here's to a great 2023 riding season!

What would cause the self-test lights

What would cause the self-test lights

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