A breakdown diagram for a 89 olds regency

I have be unable to locate a diagram for free, however the owners manual is available on eBay, here is the link to the auction site. 1988 ORIGINAL OLDSMOBILE OLDS DELTA 88 98 REGENCY OWNERS MANUAL SERVICE...

most relays for this are under the hood in the fuse box it is usually on the pass side just on the wheel well could be on drivers side also but it should be there ,

no diagram ,sorry , but usually located in the fuse/relay box in the engine compartment and the cover will have list of which is which

Do you know if your 98 has adaptive lamp monitor module ? Do you know how to read a wiring diagram ? Thier is no relay for the headlmps on your vehicle !
Do you know how to test automotive electrical circuits with a DVOM - digital volt ohm meter ! Free wiring diagrams here http://www.bbbind.com/free_tsb.html Enter vehicle info. year , make , model and engine size . Under system click on lighting then under subsystem click on headlamps . Now watch these videos on electrical testing and basic's . These guy's are professional tech's .
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The fuel pump will come on then, shut off when the key is placed in the ON position, this is normal. What is not normal, is when the key is turned to start the engine, and the fuel pump does not run when the engine is running at the same time. The initial power up you hear is a prime function that all vehicles have.

under hood fuse box-check the label it is in there and will be identified.

Haynes manual at the parts store. Disconnect the Postive side of the battery before working on the starter.

there are a handfull of secrets to rebuild one of these. An ATSG rebuilding manual will give you nearly everything you need. The secrets usually aren't in the books though.

Review this Wiring Schematic about Olds 98 ('89, '90 & '91):
1989 1
1989 2

1990 1
1990 2

1991 1
1991 2

I really hope help you with this (remember rated this help). Good luck.

go to google and search there. i was able to find my master cylinder diagram there for my truck.