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![Rock Light circuit triggered by dome lights (doors) or by dash switch.
The fuse & relay must be sized to match or exceed the lights. A common 30A Bosch/ISO relay will handle up to 6 55W bulbs using a 30A fuse. A pair of 55W bulbs only requires a 10A fuse. The 3A fuse is only necessary if the new relay is on the other side of the firewall from the dash switch.
See also:
[url=http://www.supermotors.net/registry/media/849725][img]http://www.supermotors.net/getfile/849725/thumbnail/fusesblades.jpg[/img][/url] . [url=http://www.supermotors.net/registry/media/830776][img]http://www.supermotors.net/getfile/830776/thumbnail/fusiblelinkrepair.jpg[/img][/url] . [url=http://www.supermotors.net/registry/media/832986][img]http://www.supermotors.net/getfile/832986/thumbnail/bulbsfuseswire.jpg[/img][/url]
https://www.fleet.ford.com/truckbbas/non-html/1997/c37_39_p.pdf](https://www.supermotors.net/getfile/675148/fullsize/rocklightrelay.jpg)
Rock Light circuit triggered by dome lights (doors) or by dash switch.
The fuse & relay must be sized to match or exceed the lights. A common 30A Bosch/ISO relay will handle up to 6 55W bulbs using a 30A fuse. A pair of 55W bulbs only requires a 10A fuse. The 3A fuse is only necessary if the new relay is on the other side of the firewall from the dash switch.
See also:
. 
. 
https://www.fleet.ford.com/truckbbas/non-html/1997/c37_39_p.pdf
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