The blinking light usually means, that the voltage is too low to provide proper functioning of the system. If you have ever seen the rear window defrost light blink, that indicates the same problem. If you have a lot of load on the alternator, you will see this happen.

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Jeff Lawrence
1989 300e
2000 Dodge Grand Caravan SE
No matter what you fix, there will always be something else to fix..
"Warranty" is just another way of postponing the inevitable.