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Re: how do I read the diagnostic lights
There is probably a section of the user's manual that will tell you what each sequence of lights means, and whether you could fix it yourself or call a repairman. So, check your user manual first to see if it gives any information on it. And if it does make a note of it.
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The blinking is a trouble code for the auto trans. It will tell you what the trouble is, which may be quite minor. If unsure, have a mechanic connect a readout device to the car to interpret this code.
You are right, it could be almost anything. The first thing would be to check the trouble code readout to see if that gives a clue.
My 94 did this twice at different times. The first was fractured contacts under the base for the EFI main relay. Thus the fuel and spark would sputter on and off. Older Camrys develop this fault commonly. You can see it when you turn on the ignition, (but don't start it) and the trouble light on the dash does not show up
The second time the ECU (computer) itself had become faulty. The car would start, then not, then run rough. It is not an expensive repair with a ECU from the wreckers, and it can be tested on a diagnostic machine.
Try going back to the part store and have them to do a diagnostic readout done....
I don't think your transmission is actually jumping out of gear, But I do believe that your transmission is either low on flued or has a stopped up filter. It could possibly be that the pump is going out in your transmission or even a bad solenoid.... The problem is definately in your transmission...
Try getting back to that part store to get a troubled code read out on their diagnostic computer... Email me the codes at Andyt435@gmail.com and I'll tell you what the code is and how to fix the problem.
If the digital display is going blank, but the Power On light is staying on, the problem has to lie in either the Controller Transformer or the Controller. To determine which, just check the voltage at the 2 red wires that go from the Controller Transformer to the back of the circuit card. That should read around 26VAC whenever the Power On light is on. If the voltage is still present when the Controller goes blank, then the problem lies in the Controller. Contact The Broaster Company through their website, www.broaster.com, and call the Service Department. They can easily provide a Service and Parts Manual to you, as well as help you troubleshoot your problem. Good luck and I hope this helps.
i would reset the light and start over. it sounds like things were unplugged for testing purposes. dont let it intimedate you. let me know what else you find. you can e mail me at email@example.com
it means there is a trouble code in your computer the only way to read them is to have a diagnostic computer for your car. most shops probly wont be able to read alfa romeo codes so you may need to shop around
I would start by retrieving the diagnostic trouble codes. To do this, with the run switch on the right grip set to run, hold the odometer reset button in and turn on the ignition to run then release the odometer reset button. Background lighting should illuminate, the speedometer needle should sweep its full range of motion and the indicator lamps should illuminate. After that the readout on the odometer should indicate any trouble codes. If there are any trouble codes I have a list of them to direct you to the problem. If you want to clear the codes, press the speedometer reset switch for more than 5 seconds when the DTC is displayed.
Displaying & Reading Trouble Codes (DTC Memory) Air Conditioning (A/C)
Models 208 as of MY 1998
Diagnostic trouble Code Memory 
The A/C pushbutton control module (N22) has DTC memory and data output. The diagnostic trouble codes and data are displayed via the temperature display window. The stored DTC's will remain in memory even with the vehicle battery disconnected.
The DTC memory differentiates between current and intermittent faults.
Numerous DTC's can also be read with the Hand-Held Tester (HHT).
Preparations for DTC Readout
Review 11, 12, 13, 14, 15, 21, 22, 31, 31, 41
Temperature selector: left: "HI"; right: "LO"
Within 20 seconds press REST and EC simultaneously for more than 5 seconds.
The LED in Recirculated Air flashes and the display shows "d1A".
Press AUTO repeatedly until all DTC's are displayed. Record each DTC as it is displayed.
Each fault (short circuit, open circuit) is assigned a DTC. Thus in the left display: "E1" appears, and the right display indicates the DTC. The current faults (refer to table) are displayed first, next, the intermittant failures (e.g. 45 °5) are displayed in the display window next to the FAN symbol. By pressing the right AUTO the next DTC is displayed.
To erase: Can only be performed after all faults have been readout. Press left AUTO and right AUTO buttons simultaneously for more than 2 seconds and the display shows: left: "d" and right: "FF". To cancel erase: By pressing the left AUTO button, the current faults will appear again.
Select a base temperature setting.
Turn ignition OFF, to end test.
Due to instrument cluster (IC) series interface, DTC's may be stored in IC memory, therefore readout and erase DTC's from IC memory.