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Topic: SOLVED !! internals of the auto lamp module (Read 15252 times) previous topic - next topic

SOLVED !! internals of the auto lamp module

Reply #90 –
Quote from: jcassity;406846
Hey power up in either direction too so I wonder if that is a problem
What did you mean? I don't understand.

Use standard LED diode as shown on the picture above (with resistor).

SOLVED !! internals of the auto lamp module

Reply #91 –
What I mean is I thought I could find an LED and apparently I'm having trouble doing so

I am wondering if the lightbulb in led form will substitute or not

I cannot seem to find myself an LED like the one you have in the pictures and I'm sorry for mistaking the diagram as a diode

SOLVED !! internals of the auto lamp module

Reply #92 –
hold on,, i think my son has a new bag of LED's he ordered.

SOLVED !! internals of the auto lamp module

Reply #93 –
Well, there is another option without LED. Set your pot to 1k, conect it between ACC an Q1C directly and try to measure the voltage on Q1C. For both bright and dark. R6 will be still disconnected.

SOLVED !! internals of the auto lamp module

Reply #94 –
no go on led's

what purpose are they serving for our test for step 1?  if they are just a visual that i have power, i have my test light i was using anyway...and meter.

SOLVED !! internals of the auto lamp module

Reply #95 –
Quote from: Trinom;406853
Well, there is another option without LED. Set your pot to 1k, conect it between ACC an Q1C directly and try to measure the voltage on Q1C. For both bright and dark. R6 will be still disconnected.

ok, doing this now

SOLVED !! internals of the auto lamp module

Reply #97 –
With 12v applied to the resistor 3 V appears at the collector of Q1 with low light

With 12 V applied to the resistor 12 V appears on the collector of Q1 in high light

SOLVED !! internals of the auto lamp module

Reply #99 –
Thank you very much I hope we made progress today

SOLVED !! internals of the auto lamp module

Reply #100 –
Yes, we did. I will try something at work tomorrow. I want to verify my ideas before sending you a modification instuctions. It will be easy, don't worry.

SOLVED !! internals of the auto lamp module

Reply #101 –
And thank you for being a soldier on this one I appreciate it very much

As I said before when I grounded the free leg of the resistor the lamps did not come on at all so that means there something going on with Q2

I asked softtouch to dig into the nickname transistors, he seems to be guru in finding hard to find information
 

SOLVED !! internals of the auto lamp module

Reply #102 –
Fixed

Swaped in one of my transistors I picked up from RadioShack
I guess I didn't initially have enough transistors to choose from but after my trip to the mall yesterday at RadioShack it gave me more options to swap in Q2 part numbers

It is a 2n3906 PNP transistor for Q2

All functions seem to operate perfectly now except for an initial power up. My auto lamp relay was clattering at first but  I powered down then powered back up and all is working well so far

Wait till Trinom sees this

SOLVED !! internals of the auto lamp module

Reply #103 –
I have stress tested the repair, seems to be back to normal...  ready to move along to a new thread stemming off the mod by thefoeyouknow.
Trinom, frankly if it was not for you taking the time to lay out the circuit in schematic form, i would have to map this thing out myself which did save me a ton of time.
i appreciate you always and thank you again.

I have even "confused" the autolamp system , a lot of people dont know you can do this but if you pick auto lamps and then pick headlamps manually, then turn off autolamps then turn auto lamps back on, then turn manual lamps off it will malfunction for about 5seconds.  This test passed as the system got confussed then recovered.
basically if you just shag with the switches like a retard, it will act odd for a moment or two then pick up auto lamps again.

our injected battery voltage on the transistor q2 must have caused the damage and being its a pnp transistor depending on the state it was in during power up of the back feed modification, this means my resistance readings seem more valid now to which part of the transistor had the issue.

i can not thank you enough, thanks for the team work and sticking with me on this.

SOLVED !! internals of the auto lamp module

Reply #104 –
I'm happy reading this. If you want to make your module idiot proof you can add two more diodes (standard type, 1N4007 for example) to the wiring harness.
First one should be in REL OUT line. Anode should be connected to the module and cathode to the wire (Cut the REL OUT wire few inches from the module and put a diode between the wires). This diode protects the circuit against reverse voltage from your headlamps.
The second one should be connected between cathode of first diode and GND (anode connected to ground). This is one is much more usefull than D1. This one will protect the circuit agains voltage peaks from rellay.
Here is a quick sketch, how to do it.


I meantioned earlier, that I will simulate the whole circuit, so I have complete schematic of my Autolamps module. Here it is.
X
Q1 and Q2 values were only for simulating purposes. Jay, please tell me both transistor values you found to be working. You've found Q2 to be 2n3906. What Q1 did you use? 2N2222?