I can't find a way to sugar coat it... Chiltons manuals suck compared to the Factory Service Manuals published by Helm
. Try Ebay or this forum for a reasonably priced (~$40 or so) used one.
Your vehicle does not use relays in the headlight circuit, nor does the 92-99. The relay is added to to act as a switch and also isolate the LO and HI beam circuits. This is an appropriate area to post your question as it is electrical in nature and my first post was in response to your specific question. It appears as if a few others have the same idea so we can broaden the instructions for others. Your shopping list is the same as above but your wire colors are different:
90 without Driver'* Information Center
LO beam wire - TAN
HI beam wire - LT GRN
Relay wiring in the same but you do not have the Maxifuse block. Instead, you should have a stud on the firewall where all of the fuseable links connect. This is where you can connect for battery.