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had to disconnect negative battery cable to clear a/c code. when reconnected the touchscreen how shows riviera instead of reatta. also fog lights now burn whenever car is running-cannot control then with switch and they remain on for about 20 seconds after car is shut off. acts as if car has twilight sentinel-it does not. any ideas? confused.gif" border="0

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Guest Stan Leslie

This is an new original quirk. I think you win the May award. I will assume you have an 88 or 89, to display 'Reatta'. The BCM, I think, can be reprogrammed for Riviera vs Reatta and Daytime Running lights (required in Canada), activated or not. I think this can be done through the diagnostics mode, although I have never attempted. Maybe someone else has had a similar experience.

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Guest Stan Leslie

Checked my 89 service manual. It appears that the BCM can be reprogrammed (see pages 8D-11 and 8D-13 & 14). You can view the EEPROM contents to see if that is the problem (BD90 Option Content #1), by referring to 8D-11. If re-programming is required, that can be done using the 'override' function as outlined in 8D-13 & 14.

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I know the light problem should be programable thru the CRT. The Riv' from Reatta I don,t have a clue. I put in a Riv'<BR>CRT in my Reatta and it displays Reatta.<BR>The service manual has programing instructions. shocked.gif" border="0

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This may be tough to solve since you probably don't have a service manual. <P>First question, are you headlights also on?<BR>I believe on the '88-'89 you can turn on the headlights without opening the headlights.<BR>If they are on,try turning them off and what happens to the fog lights?<P>There is a possibility that Stan is correct.<BR>In section 8D-14, Data Display code BD90 is option content #1. If somehow code 132 appears as one of the options, that would tell the BCM your vehicle is a GM30 (Riviera)<BR>option 148 is GM33 (Reatta)<P>several pages later, under Override Displays, <BR>it appears that BS06 will allow you to select the above options. <P>If someone has an '88 or '89 and a service manual, you might look at this and see what happens.

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the headlights can be on or off. it does not effect the fog lights. they burn all the time and are not controlled by their switch or the headlight switch.

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