SES

[T Carter]

Hi fellas,,, I have a issue with the SES light on my gn. This car came with a cyberdyne digital dash, i had noticed that the ses light never came on or flashed when turning the key on, of course i thought that the bulb was shot. I took the dash apart and there was no bulb in the plastic pod, nor was the pod locked into place in the dash socket. I put it back into place and placed bulb in the socket turned key to on position and presto, so i thought, the light never shuts off when the ignition is on. What wire feeds the SES light

 

[TurboBuRick]

http://www.vortexbuicks-etc.com/ecmwiring.htm

Looks like A5

 

[T Carter]

hi, rick.. any ideas on what causes the SES light to stay lit? I am wondering if the installing of the cyberdyne digital dash caused this issue. I have a scanmaster and no mal codes .

 

[RmvBfrFlght]

The SES will stay on until the engine is running. At key-on, engine-off the SES should: turn on briefly, blink off, then turn on solid. Can repeat the test after at least 10 seconds of key-off.

The ECM provides a ground to turn on the SES light. If the quad-driver in the ECM is toast that can cause the SES to always be on.

RemoveBeforeFlight

 

[T Carter]

I was wondering. If the bulb stays on, when I go to Install the new chip will the ses still flash off and on like the instructions speak of ?

 

[RmvBfrFlght]

I believe that all chips should cause the SES to blink off. Another test you can do is to remove the PROM and do a key-on, engine-off. If the ECM is running OK the SES will be rapidly flickering. This is the ECM doing a checksum of the chip contents which of course will fail.

RemoveBeforeFlight

 

[T Carter]

I don't mean to sound stupid, is the prom another type of chip in the ecm?

Posted from the TurboBuick.Com mobile app

 

[notacarlo]

The prom is the "chip".



Posted from the TurboBuick.Com mobile app

 

[T Carter]

Ok. Gotcha ... What is a modded ecm

Posted from the TurboBuick.Com mobile app

 

[notacarlo]

Driver updates for larger injectors.

Posted from the TurboBuick.Com mobile app

 

[T Carter]

Do you have to modify the ecm ? To install bigger injectors.

 

[notacarlo]

Not any more. The new style high impedance injectors work with the prom. You just have one of the vendors burn a chip for your combo including injectors.

Posted from the TurboBuick.Com mobile app

 

[T Carter]

I gotcha. I have new tt combo kit

Posted from the TurboBuick.Com mobile app

 

[notacarlo]

Can't go wrong with TT.

Posted from the TurboBuick.Com mobile app